Where to Buy Agilent (Part: 820950-908) Zorbax NH2 Guard Cartridges 4.6 x 12.5 mm | Greyhound Chromatography

Shop here for Agilent (Part: 820950-930) Zorbax Extend-C18, Guard, 5u, 4.6x | Greyhound Chromatography

1 Million Chromatography Consumables Available 

With over 1 million products available from Greyhound Chromatography we are sure to have the products you need for your research and analysis.  

We are working hard with our worldwide suppliers to bring to you the products you need to combat Covid-19.  The Coronavirus has changed the world in a few short weeks but we contiune to work to ensure continuity of supply. We are able to supply our products worldwide from our warehouse facility in the UK.  Products are delivered direct from the UK by Air, Road and Sea; we choose the most efficient and cost effective method of transport for your orders.  You can be assured that from the moment your order is placed our Customer Services team ensure that your goods arrive as quickly as possible, while complying with transport and customs regulations, whichever country the goods are destined for.  We are happy to provide documentation support for the more challenging shipments. 

The world's situation may be challenging but we assure our customers that we are here to ensure that getting what you need is our top priority. 

You can visit our website www.greyhoundchrom.com where you will find the world's leading scientific brands represented. 

We are confident that we have the Chromatography consumables you are looking for.

Established in 1981, Greyhound Chromatography has been supplying high quality Chromatography consumables to Research and Analysis Laboratories around the world for 38 years. Greyhound's Managing Director, Paul Massie, founded the company which operates from its UK warehouse and office facility, located in Birkenhead, Merseyside.  Greyhound Chromatography is accredited to ISO 9001:2015, and has been accredited since January 1995.  

Greyhound Chromatography is a leading global manufacturer and distributor of the highest quality chromatography columns, consumables, certified reference standards and materials  (including custom made mixtures), research chemicals, high grade analytical solvents, reagents and laboratory consumables available today. Greyhound supplies scientists working in all disciplines, including HPLC and Gas Chromatography. Greyhound Chromatography is probably the leading single source of chromatography products and chemical standards anywhere in the world.

Greyhound Chromatography's extensive product range covers all areas of Environmental, Petrochemical, Food, Fragrance, Forensics, Chemical and Pharmaceutical analysis, holding stock of many popular products for prompt delivery via our extensive logistics network.

 

General Chromatography Consumables

 

Equipment Balances and Scales

Adam Equipment offers a comprehensive selection of precision balances, analytical balances and moisture analysers created for laboratories. Durable construction and smart features make Adam balances ideal for all lab applications, including weighing chemicals, pharmaceutical processing and quality control checking. Designed for laboratory professionals, Adam's digital balances and moisture analysers are easy to set up and operate, providing reliable weighing results and simplifying complex measurement tasks.

•  Research and development laboratories rely on Adam Equipment balances for weighing chemicals, powders and other samples.
• Pharmaceutical labs use analytical and precision balances for research and development, for quality control during production, and in pilot testing.
• Adam balances and moisture analysers make it simple for materials testing labs to verify construction substances, such as concrete or asphalt.
• Food processing and manufacturing facilities use Adam lab balances in quality assurance testing, to achieve consistent production quality and to ensure items meet standards.
• Digital balances and scales are used in forensics labs to weigh evidence seized during crime investigations.

 Researchers and lab professionals worldwide turn to Adam for laboratory weighing solutions that deliver speed, performance and exceptional value.

 

Biosolve Chemicals, Solvents in pure form.

 

Optimised logistics in a booming industrial environment. Biosolve’s core business builds on more than 40 years of experience producing and distributing high purity solvents, formulations and reagents for research, pharmaceutical, biotechnology, chemical and food-processing industries.

Biosolve is a major player in the world market, with a leading position in the production of very high purity reagents, formulations and solvents, specialising in liquid and gas phase chromatography and specialised products for organic chemistry and DNA/RNA synthesis.

Perfect product quality is our top priority and one of the strengths of our product range.

Reagents and solvents – whether standard or made-to-order, purity is guaranteed.

In addition to producing pharmaceutical, chemical or analytical grade reagents and solvents, Biosolve can offer specialised product lines including formulations and ultra-pure solvents for custom applications, of particular importance in the pharmaceutical industry. A pilot project will be created to assess feasibility and costs.

A complete range of reagents and solvents

• Analyticals
• Environmental Analysis
• Bulk & Semi-Bulk Solvents
• Peptide Synthesis
• Life Sciences
• Solvents & Chemicals, Dry, AR & Pure
• Electronic Grade Solvents & Formulations
• Organic Chemistry

Dedicated solutions Solvents & Formulations for HPLC & UHPLC / Mass Spectrometry / SFC Solvents for Gas Chromatography Spectrograde PAH (For detection of Polyaromatic hydrocarbons. Solvents are analyzed by HPLC using UV and Fluorimetric detection of 16 standard Polyaromatic hydrocarbons as per EPA500 and 600 methods) LV-GC (For ultimate Trace Organic Analysis include most other grades features) Dioxins & PCB’s (Analyzed for the detection of ultra low level of dioxin and C2 to C10 PCB analysis) Pesti-S (Our classical solvent for analysis of pesticides, residue, ECD and NPD analyzed for the evaluation of pesticide residues)

Auto Sampler Vials, Caps & Seals

Chromacol has the most extensive and highest quality range of auto-sampler vials, caps and seals and storage vials available from any single manufacturer.

Chromocol's range of chromotography products includes products for Life Sciences, High Throughput Screening and Combinational Chemistry.  Chromocol Products are best known for the extensive range of vials, caps and seals that are produced for the wide range of autosamplers used in HPLC, GC and associated analytical techniques. 

GC Supplies

CRS has over 25 years of experience manufacturing high-quality GC supplies. CRS are a leading manufacturer of electronic and manual crimping tools, gas filters, ferrules, and injection port septa. CRS also provides sample vials, caps and seals, and other GC accessories for sample injection and capillary GC columns. Our products are used in analytical laboratories worldwide, where they are known for quality, ease of use and high levels of support.

 

Smart Safety Caps for HPLC

AIT HPLC Smart Healthy Safety Caps are designed to comply with the increasing safety regulations of the modern laboratory and are manufactured from inert, chemically resistant materials, such as PTFE and Polypropylene.  Solvent safety caps come in a variety of outlet combinations or can be custom made. 

 

Gas Regulators

As part of the worlds largest gas control company, with over 100 years experience in the design, development and manufacture of specialty, medical, technical and industrial gas control, Gas Arc products and solutions can be found in most production and analytical processes globally.

With manufacturing on 5 continents and a culture of continual improvement, Gas Arc are committed to delivering market leading quality branded solutions to customers using the latest global Quality Management Systems.
Gas Arc products have an international reputation for unparalleled performance and built-to-last dependability.

  

 

Reference Standards and Materials 

 

Reference Standards Guide

Greyhound Chromatography supplies an extensive range of pre-prepared and custom made Certified Reference Standards and Materials from a number of leading manufacturers, including British Pharmacopoeia (BP), Cerilliant (a Sigma Aldrich Company), Chem Service Inc., Chiron, European Pharmacopoeia (EP), Extrasynthese, High Purity Standards, Honeywell (Fluka), Laradon, NIST, Paragon Scientific, Pfaltz & Bauer, RTC (a Sigma Aldrich Company), United States Pharmacopoeia (USP), Wellington Laboratories.

Please note you will have to register with Greyhound’s website www.greyhoundchrom to view the current UK list prices. There may be a discount available for bulk purchases or repeat orders, please request a quotation from sales@greyhoundchrom.com

British Pharmacopoeia (BP) is the national pharmacopoeia of the United Kingdom. It is an annually published collection of quality standards for UK medicinal substances. It is used by individuals and organisations involved in pharmaceutical research, development, manufacture and testing.

How to order British Pharmacoepoeia from Greyhound Chromatography

British Pharmacopoeia’s catalogue can be found HERE

Note the Catalogue number, Pack Size and Substance Name and the quantity required, Email sales@greyhoundchrom.com for a quotation, the quotation will include delivery costs and details of any specialised shipping requirements.

 Please note that items that require a Licence are not available.

Environmental and Pesticide  Reference Standards

Chem Service Inc. Established in 1962 is accredited to ISO Guide 34:2009, ISO/IEC 17025:2005, and registered and certified to the ISO 9001:2015 Quality Management System for the design, development, production, distribution, and servicing of organic neat and synthetic reference materials.

Chem Service, Inc. produces high purity standards for use as reference materials and for other laboratory purposes. More than 95% of Chem Service’s Standards Grade materials have a certified purity of 98.0% or greater and do not require purity corrections when preparing solutions for use with EPA, USTM, UST, and numerous other international methods. You can trust that Chem Service’s high purity standards are a quality product.

Standards Grade chemicals are clearly labelled with an expiration date that is based on years of experience in handling and testing. Products are packaged in small quantities to minimize storage, waste, and disposal requirements. Organic and inorganic chemicals, solutions, and mixtures are available to meet a wide range of specialized laboratory needs.

Product groups include Environmental and Analytical Standards, Organic and Inorganic Standards, Over 2,000 Pesticide and Metabolite Standards (including banned and discontinued items), Phthalate Standards and Vitamin Standards.

Chem Service offers custom synthesis, solutions and mixtures made to your customer’s specifications.  Custom made solutions are provided with full Certificates of Analysis.

Chiron Analytical Reference Standards

Chiron has manufactured reference materials for over 30 years. Chiron offers a varied, flexible and innovative range of over 10 000 reference materials, specifically designed and developed to suit the needs of individual customers. Reference materials can be for anything from complex “molecular fossils” derived from once-living organisms, to markers of disease or exposure to chemicals. Chiron is well-known for reference materials which are applied in petroleum exploration and oil spill analysis, a large range of alkylated polyaromatic compounds and PAH metabolites, pollutants found in food and the environment, and for the introduction of many new carbon 13-labelled drug standards.

 How to Order Chiron Products from Greyhound Chromatography

Chiron have an ever increasing catalogue of products, in order to ensure that you are accessing the most up-to-date information the best way to view Chiron’s products is to visit their website www.chiron.no Note the part number, Product Name and required quantity and email sales@greyhoundchrom.com with your requirements, we will then provide you with a quotation and delivery details. There may be a discount available for bulk and repeat orders.

European Pharmacopoeia Reference Standards

European Pharmacopoeia is a major regional pharmacopoeia which provides common quality standards throughout the pharmaceutical industry in Europe to control the quality of medicines and the substances used to manufacture them. It is a published collection of monographs which describe both the individual and general quality standards for ingredients, dosage forms, and methods of analysis for medicines. These standards apply to medicines for both human and veterinary use.

How to order European Pharmacopoeia (EP) from Greyhound Chromatography

British Pharmacopoeia’s catalogue can be found HERE

Select the Reference Standards Tab, note the Catalogue number, Pack Size and Substance Name and the quantity required, Email sales@greyhoundchrom.com for a quotation, which will include delivery costs.

Please note that items that require a Licence are not available.

 

Extransynthese Natural Plant Based Reference Standards

    Reference Standards from Natural Substances

Extrasynthese are experts in extraction, synthesis and purification of natural substances. Extrasynthese’s product portfolio consists of hundreds of products, after almost 30 years of research and development creating reference standards for regulatory filing, quality testing, or as substrates for early stage R&D.

How to Order Extrasynthese Products from Greyhound Chromatography

Visit Greyhound’s website www.greyhoundchrom.com, select the Brands tab, click on Extrasynthese and view the product catalogues. Select the products you want and send an email to sales@greyhoundchrom.com for a quotation and delivery details.

 High Purity Standards Inorganic Reference Standards and Custom Mixtures

High-Purity Standards has proudly served the scientific community for the past twenty years with high quality spectrometric standards and reference materials for AAS, ICP, ICP-MS, GC, GC-MS and IC, and has now expanded their stocked reference materials to include ISO Guide 34 multi-component organic reference materials.

Approximately one-half of High-Purity Standards business is in the preparation of custom blends and difficult to prepare special mixtures.

There may be a discount available for bulk purchases or repeat orders, please request a quotation sales@geyhoundchrom.com

If you require a custom mixture please email sales@greyhoundchrom.com with details of your requirements, we will then provide a quotation and an indication of delivery time.

 

Honeywell Research Chemicals and Fluka Analytical Reference Standards

      CLICK HERE FOR MORE INFORMATION

Honeywell Fluka™ Analytical Standards offers a range of high quality inorganic and organic reference materials for the European market produced according to ISO 9001. Honeywell’s products are suitable for a wide range of industries and applications and come complete with a detailed Certificate of Analysis (CoA) in every delivery,.

How to Order Honeywell Products from Greyhound Chromatography

You can view Honeywell’s products HERE note the part number, Product Name and quantity required and email sales@greyhoundchrom.com for a quotation.

Larodan Research Grade Lipids

Larodan makes a comprehensive range of research grade lipids for use as analytical standards and reagents, for customers all over the world. Larodan’s products include all sorts of neutral and polar lipids, from simple fatty acids and methyl esters to complex oxylipins, glycerides and phospholipids. Larodan also provide specialty products to the Nordic market, in collaboration with other international research chemicals companies.

Larodan’s catalogue of products is constantly updated therefore it is best visit their website for their up-to-date product list. You can view their website HERE

How to Order Larodan Products from Greyhound Chromatography

Visit their website, note the catalogue number, Product description and quantity required, email sales@:greyhoundchrom.com for a quotation and delivery schedule.

 

Over 1200 Reference Materials Available from NIST

The National Institute of Standards and Technology (NIST) was founded in 1901 and is now part of the U.S. Department of Commerce. NIST is one of the nation's oldest physical science laboratories. Congress established the agency to remove a major challenge to U.S. industrial competitiveness at the time—a second-rate measurement infrastructure that lagged behind the capabilities of the United Kingdom, Germany, and other economic rivals.

NIST supports accurate and compatible measurements by certifying and providing over 1200 Standard Reference Materials with well characterised composition or properties, or both.

How to Order NIST Products from Greyhound Chromatography Due to the large amount of products available and the rapidly changing nature of NISTs portfolio their products can be viewed on their website HERE

Visit their website, note the catalogue number, Product description and quantity required, email sales@:greyhoundchrom.com for a quotation and delivery schedule.

*Please note that products that require a licence will not be supplied.

Paragon Scientific 

(specialises in the production of Premium Quality, Primary level, Viscosity Reference standards).

 

Paragon Scientific specialise in the production of premium quality reference materials that include Density, Flash Point, Liquid Colour, Refractive Index, TAN/TBN and Viscosity standards. Paragon produce reference materials with some of the lowest levels of uncertainty of measurement available.

Paragon’s viscosity standards, viscometer calibration, density standards and sucrose RI standards are all covered (UKAS) accreditation to the International Standard BS/EN/ISO/IEC 17025 - 2005, in addition to this Paragon’s Refractive Index standards are manufactured conforming to ICUMSA (1974).

How to Order Paragon Scientific Products from Greyhound Chromatography

 Due to the large amount of products available from Paragon and the rapidly changing nature of Paragon’s portfolio their products can be viewed on their website HERE

Visit their website, note the catalogue number, Product description and quantity required, email sales@:greyhoundchrom.com for a quotation. There may be a discount available for bulk purchases or repeat orders.

   

Hard to Find Chemicals from Pfaltz & Bauer

Pfaltz & Bauer are renowned for supplying rare and hard to find research chemicals and laboratory chemicals that seem impossible to find, Pfaltz and Bauer also supply a complete range of routine laboratory chemicals.

Whatever your discipline Pfaltz and Bauer can supply your chemical needs.

How to Order Pfaltz & Bauer Products from Greyhound Chromatography

 Due to the large amount of products available and the rapidly changing nature of Pfaltz & Bauer’s portfolio their products can be viewed on their website HERE

 Visit their website, note the catalogue number, Product description and quantity required, email sales@:greyhoundchrom.com for a quotation and delivery schedule.

 

 Environmental Testing Standards from Wellington Laboratories

Wellington Laboratories Environmental and Toxicological analytical testing Reference Standards and Materials . Wellington are the primary source of Standards for EPA Methods 23, 513,1613,1668, 8280, 8290, European Method EN -1948 and World Health/EPA Standards, C13 and Native Dioxins, Furans, PCBs and Brominated Diphenyl Ethers, Brominated Dioxins and Furans, Methylated PCDDs and PCDFs, Fluorinated Compounds, Polychlorinated Dibenzo-p-Dioxins, Polychlorinated Dibenzofurans, Polychlorinated Biphenyls, halogenated flame retardants and Perfluorinated compounds. and more. …..    

 Quality Management

Wellington are committed to the distribution of quality products as well as the maintenance of excellent customer service.  In fact, in order to provide you with the best possible service, Wellington Laboratories now have three ISO certifications (ISO 9001:2015, ISO/IEC 17025:2005, and ISO 17034:2016) which cover all aspects of planning, production, testing, distribution, and post-distribution service.  These certificates allow us to monitor and maintain the highest level of quality and service and also allow our customers to satisfy the requirements of their own ISO certifications.

If you require a hard copy of any of Wellington's ISO certificates, please do not hesitate to contact us at info@greyhoundchrom.com

 

Contact Us!

Tel:          +44 (0) 151 649 4000

 Web:       www.greyhoundchrom.com

 Email:      info@greyhoundchrom.com

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Merck Supelco Analytical Methods & Products | Greyhound Chromatography

High Quality Filtering Solutions

                                       

The main source of particle contamination in HPLC columns originate in the sample to be analysed. Therefore, the final preparation step prior to sample injection into the HPLC instrument is to remove any small particulates from the sample by filtration. Removal of the solid materials is very important as they can interfere with the compound of interest and easily clog up the column being used. This will inevitably have a detrimental effect on the performance of the column, i.e. back pressure, peak size, retention time, peak shape. Severe contamination can lead to the column being irreversibly blocked and therefore having to be replaced. Other costs can include instrument downtime, and the loss of valuable samples.

Sample Types

Samples differ in a variety of ways, they may be heavily loaded with fine or coarse particulates, dissolved in aqueous or organic solvents with varying viscosities. To facilitate the most appropriate sample preparation result, filters should be optimised to match the particular requirements of each kind of sample being injected.

Standard Samples

A matrix of 5-10mL is the most common sample volume, with low viscosity, low particle contamination and dissolved in either an organic or an aqueous solvent. Greyhound Q-Fil Regenerated Cellulose Syringe Filters are an excellent choice for such samples. Their inert housing manufactured from high density medical grade virgin polypropylene, complete with the integrated Regenerated Cellulose (RC) membrane has a high chemical resistance against the most common HPLC solvents and is very suitable for aqueous samples. Every batch is HPLC-tested for low extractables. Whilst 0.45µm is the most commonly used membrane porosity, the 0.22µm membrane provides improved purity when using capillary columns or HPLC packings with a particle size of 3µm or less.

Demanding Samples

More difficult samples which contain high loads of particulates, high viscosity or unusually high volumes place additional challenges on the user when preparing samples for HPLC analysis. The particles have a tendency to block the filter, high viscosities will decrease the flow rate and high volumes increase the time required to complete the filtration process. These challenges often result in the user applying a greater degree of manual pressure to the process and potentially exceeding the maximum pressure limit of the filter with a subsequent risk of bursting the housing. As a result, the sample will be lost and a potential safety risk can arise if corrosive solvents or harmful chemicals are being filtered. To assist in overcoming these challenges, the use of Q-Fil Syringe Filters with a built in Glass Microfiber pre-filter are recommended. The pre-filter removes the larger particulates from the sample leaving only the smaller particulates to be filtered by the membrane. These filters increase the flow rate through the unit resulting in a higher volume of sample to be filtered and less pressure being required by the user.

Small Volume Samples

Smaller volume samples are often valuable and require special attention. Any loss of the analyte due to adsorption by the filter membrane or housing or a large dead volume can have a detrimental effect on the analysis. Smaller filters of 13mm and 4mm diameter decrease the dead volume to less than 25uL and 8uL respectively making them ideal for smaller volume samples.

Summary

Sample filtration is an important factor in ensuring that HPLC analysis is achieved in an efficient and cost-effective way. The extensive range of Q-Fil Syringe Filters have been developed to meet the demands of the analyst and the different sample matrices being used and without losing any of the important sample.

Quality is an Important Factor

Greyhound ensures that every batch of filters is manufactured and tested in accordance with strict ISO 9001:2000 quality procedures.

Greyhound ensures that each batch is checked prior to release for:

- External Dimensions - Bubble Point - Water Flow Rate - UV Extractables - Burst Pressure and compliance - Filter Integrity.

Choosing a filter on price against quality is not cost effective in the long run.  Although higher spec filters may seem expensive it is false economy to choose cheaper filters as their fail rate is much higher, causing delays in the laboratory.

Q-Fil Syringe Filters

How to choose the right syringe filter for your application

•          Choose the size of filter based on the volume of sample to be filtered
•          Choose the filters porosity based on the size of the potential particulates in the sample. It is important to be aware that the finer the porosity of the membrane the greater the pressure will be required to pass the sample through the filter. A sample containing large quantities of particulates is best filtered using a filter with a built-in glass microfiber pre-filter
•          Choose the type of membrane based on the solvent being filtered 

30mm Diameter Designed for the largest sample volumes or solvent filtration Filtration area 5.39cm2 Maximum filtration volume <200ml Maximum operating pressure 87psi (6.0 bar) at 20°C Sample volume <200ml Holdup volume <200µl
25mm Diameter Designed for larger sample volumes or solvent filtration Filtration area 4.08cm2 Maximum filtration volume >100ml Maximum operating pressure 87psi (6.0 bar) at 20°C Sample volume <100ml Holdup volume <100µl
13mm Diameter Suitable for most applications Filtration area 1.09cm2 Maximum filtration volume >10ml Maximum operating pressure 87psi (6.0 bar) at 20°C Sample volume <10ml Holdup volume <25µl
4mm Diameter Suitable for smaller volume applications Filtration area 0.1cm2 Maximum filtration volume <2ml Maximum operating pressure 75psi (5.0 bar) at 20°C Sample volume <2ml Holdup volume <8ul

 Pore Sizes

Q-Fil Syringe Filters are available in 0.22µm and 0.45µm pore sizes, (other pore sizes are available on request). The 0.22µm filters remove the smallest particulates whilst the 0.45µm filters are designed to remove particulates which would be detrimental to most analytical columns.

Pre-filters have a glass microfiber membrane which is chemically inert and resists most solvents. Q-Fil glass microfiber pre-filters are recommended for removing large particulates from the sample and are ideal for dissolution tests.

 Syringe Filters with Glass Microfiber Pre-Filter 

These filters have the same high-quality filter membranes and polypropylene housings as our other Q-Fil Syringe Filters, but include a Glass Microfiber (GMF) membrane used as a pre-filter

The glass microfiber pre-filter is mounted before the microporous filter membrane, eliminating the need for a pre-filtration step, minimising sample loss and prolonging the life of the filter membrane

Flow rates are increased and the filtrate volume is significantly greater when compared to filters without pre-filters

Flow rates are increased and the filtrate volume is significantly greater when compared to filters without pre-filters

Regenerated Cellulose membrane filters with the GMF membrane incorporated as a pre-filter, are particularly useful for tissue culture media filtration, as well as for general biological sample filtration

These filters are ideal for general laboratory filtration of samples which contain excessive amounts of particulates

The glass microfiber pre-filter removes the large particulates and prevents premature clogging of the filter membrane

Greyhound Q-Fil Membrane Filters

 Q-Fil Membrane Filters set the new Quality standard for today’s analytical laboratories. Manufactured from the highest quality materials, Q-Fil Membrane Filters provide excellent chemical compatibility with acids, alcohols, bases, ethers, glycols, ketones and oils.

 As a trusted name in the supply of chromatography consumables and certified reference standards, Greyhound also offers a comprehensive selection of top quality own brand products including Capillary columns HPLC columns, Syringe Filters, Consumables etc. This catalogue contains details of our range of Q-Fil Membrane Filters.  Other product catalogues are available on request. 

These quality products are backed by the guaranteed reliability and technical support which has become synonymous with the name Greyhound.

 

 Membrane Filter Comparison Chart 

 

 

NYLON Features:  Hydrophilic membrane  Excellent for HPLC samples and general filtration  Compatible with organic and aqueous liquids  Good solvent resistance and high protein retention  Strong mechanical stability Not suitable for use with strong acids or bases, halogenated hydrocarbons or protein Special discounts are available for call-off and bulk orders, please enquire. Multiple Pore Sizes and Diameters Available.

PTFE Hydrophobic Features:  Hydrophobic membrane resistant to strong acids, aggressive solvents, alcohols, bases and aromatics  Ideal for the filtration and degassing of chromatography solvents and for extremely basic mobile phase solutions  Very low extractables  Mechanically strong  Excellent thermal stability Multiple Pore Sizes and Diameters Available.

 

PTFE Hydrophilic Features:  Hydrophilic membrane resistant to strong acids, aggressive solvents, alcohols, bases and aromatics  Ideal for the filtration and degassing of chromatography solvents and for extremely basic mobile phase solutions  Very low extractables  Mechanically strong  Excellent thermal stability Multiple Pore Sizes and Diameters Available.
CELLULOSE NITRATE Features:  Naturally hydrophilic  High physical strength  Ideal for clarification and filtration of aqueous samples  For immunoblotting, the high protein retention of Nitrocellulose is ideal to bind DNA Multiple Pore Sizes and Diameters available
CELLULOSE ACETATE Features:  Hydrophilic membrane  Ideal for aqueous based samples, tissue culture media filtration and sensitive biological samples  Very low protein binding capacity, lower than PVDF and PES membranes  High physical strength  Strength and dimension stability  Lower chemical resistance than Regenerated Cellulose  Multiple Pore Sizes and Diameters available.  PVDF (Hydrophobic) Features:  Polyvinylidene difluoride membrane  Hydrophobic  Wide chemical compatibility  Excellent mechanical properties  Resistant to solvents, exhibits low levels of extractables  Low protein binding, can be used with proteins and peptides  Suitable for filtration of aqueous and organic solvents Multiple Diameters and Pore Sizes Available
MIXED CELLULOSE ESTERS - Gridded Features: Gridded MCE membranes are unsupported natural hydrophilic filters which have clearly defined grid lines.  The special ink used is non-toxic and completely free from bacterial growth inhibitors.  Composed of cellulose acetate and cellulose nitrate, they are one of the most widely used membranes in analytic and research applications. The white gridded disks are specially designed for the recovery and retention of E.Coli bacteria in water/waste water analysis as well as other microbiological tests.  The black gridded disks assist with manual counting procedures and provide enhanced contrast between residue or cell colours and the filter without having to counter stain the membrane.   Features  Hydrophobic  Gridded membrane is perfect for microbiology analysis  0.22µm, 0.45µm and 0.8µm pore sizes available  Sterilised by gamma irradiation  Individually packaged with easy to open separator paper Applications  Clarification of aqueous solvents, removal and analysis of microbiological contaminants  Sterilizing filtration, air monitoring, particle monitoring, particle removal, bioassay  Dairy microbiology, retention of yeast, moulds and algae  QC analysis of fluid holding, particle collection and analysis

 

POLYETHERSULFONE Features:  Inherently hydrophilic membrane  Low protein binding  Provides high flow rates and good throughput volume  Best choice for tissue culture work  Very low extractables  Mechanically strong membrane, suitable for use with strong bases, alcohols and resistive proteins Multiple Pore Sizes and Dimensions available.

 

POLYPROPYLENE Features:  Hydrophobic, high resistance to solvents  High density with high capacity  Wide range of chemical compatibility to organic solvents  Ideal for biological sample filtration  Low protein binding  Ideal for chromatography protein analysis and biological sample filtration  Suitable for acids and bases and general HPLC analysis Multiple Pore Sizes and Dimensions available.

 

GLASS FIBER Features:  Binder Free  Commonly used as pre-filters for membranes to remove large particulates and prevent the membrane from silting   up  Extends the loading capacity of filter membranes  High flow rate and high permeability to air  Reduce filtration costs and premature clogging of membranes when filtering difficult or highly contaminated solutions  Excellent wet strength for easy handling and filter integrity Multiple Pore Sizes and Dimensions available.

 

All Greyhound Vacuum Filtration Devices are made of stainless steel which is suitable for filtration, especially in the microbiological field.    Each station uses a separate control valve for independent operation, is easy to use and to disinfect.  The multiple unit systems can filtrate three or six samples at the same time at a low flow rate, with high sensitivity.  Sturdy won’t tip when fully loaded due to the units having a low centre of gravity.  Anodized aluminum handles on both ends are designed for positioning on a benchtop.

Catalogue Number	Description
41-100600	Stainless steel manifold One 300mL stainless steel filtration unit One glass collection bottle One  length of hosepipe	41-100601	Stainless steel manifold One 300mL glass filtration unit One glass collection bottle, One length of hosepipe
41-100602	Stainless steel manifold Three 300mL stainless steel filtration units One glass collection bottle, One length of hosepipe	41-100603	Stainless steel manifold Three 300mL glass filtration units One glass collection bottle, One length of hosepipe
41-100604	Stainless steel manifold Six 300mL stainless steel filtration units One glass collection bottle, One length of hosepipe	41-100605	Stainless steel manifold Six 300mL glass filtration units One glass collection bottle, One length of hosepipe
41-100610	Stainless Steel Manifold, single unit	41-100611	Stainless Steel Manifold, three unit
41-100612	Stainless Steel Manifold, six unit	41-100613	Glass Funnel, 300 mL
41-100614	Stainless Steel Funnel, 300 mL

 

Greyhound Solvent Filtration Apparatus are used for the filtration of HPLC mobile phases, to remove particulate and microbiological contaminants.  Manufactured of durable borosilicate glass for use with aqueous, organic or corrosive liquids.   Can be sterilised in an autoclave at 121°C. The base design has an integral vacuum connection located above the filtrate drip to prevent contamination of the vacuum line with droplets. Unit consists of a funnel, coarse porosity fritted glass filter support base with integral vacuum connection and a flask with inner joint.  An aluminium clamp connects the funnel and support base.

                                             

 

Cat. No. Description 41-100620 Glass Solvent Filtration Apparatus - 300mL for 47mm dia. filters Graduated glass funnel, fritted glass base with side arm, joint flask, anodized aluminium clamp, vacuum hose 41-100621 Glass Solvent Filtration Apparatus - 500mL for 47mm dia. filters Graduated glass funnel, fritted glass base with side arm, joint flask, anodized aluminium clamp, vacuum hose 41-100622 Glass Funnel - 300mL 41-100623 Glass Funnel - 500mL 41-100624 Glass Solvent Collection Flask - 1000mL 41-100625 Glass Solvent Collection Flask - 2000mL 41-100626 Glass Filter Head Kit (includes 300mL Glass Funnel, Fritted Glass Base, Clamp, Silicone stopper) 41-100627 Glass Filter Head Kit (includes 500mL Glass Funnel, Fritted Glass Base, Clamp, Silicone stopper) 41-100628 Aluminium Clamp

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January 2021 Newsletter | Greyhound Chromatography

PFAS and Other Toxic Forever Chemicals in Drinking Water 

For over 30 years the European Union have worked tirelessly to protect the integrity of our drinking water.  EU officials have recently reached a provisional agreement to update the Union's 1998 Drinking Water Directive to tighten up the permissible limits allowed for both PFAS and several other drinking water contaminants, including bisphenol-A, microplastics, lead and chromium.   The at the time of writing the European Parliament and Council are still to formally approve the proposal. 

European drinking water standards currently far exceed the standards set in the United States but this is a changing picture as state by state new instances of contaminants are emerging.  Currently, the U.S. Environmental Protection Agency has only issued a nonenforceable health advisory of 70 ppt for PFOA, formerly used by DuPont to make Teflon, and PFOS, formerly an ingredient in 3M’s Scotchgard. Those compounds are no longer manufactured in the U.S., but they and other PFAS contaminate the drinking water for an estimated 110 million Americans. PFOA, PFOS and some other PFAS chemicals have been linked to cancer, thyroid disease, reproductive and immune system problems, and other health harms.

The european Parliament and the Council of the European Union have released new requirements for the analysis of per- and perfluoroalkyl substances (PFAS) in water intended for human consumption (5813/20).  This amendment to Council Directive 98/83/EC included perfluoroalkanesulfonates that are not commercially available.  In response to this Wellington Labroatories, Canada, is pleased to announce that its chemists have synthesized, purified, characterized and prepared accurate certified reference standards of the required substances: sodium perfluoro-1-undecanesulfonate (L-PFUds) and sodium perfluoro-1-tridecanesulfonate (L-PFTrDS).  Wellington Laboratories have also prepared a native solution/mixture (EU-5813-NSS) that contains all of the PFAS listed in the drinking water directive (5813/20) for your convenience.  This solution/mixture can be used in conjunction with two of Wellington's existing mass-labelled PFAS mixtures to easily prepare a calibration set for quantification. 

Suggested extraction standard mixture :  MPFAC-C-ES

Suggested injection standard mixture:     MPFAC-C-IS

 

                                                                                                                                                                                                             

ChemSec is an international non-profit organization that works to phase out harmful chemicals in favor of safe alternatives. In their work, ChemSec wants to create a strong link between researchers, decision makers and companies in the fight against harmful chemicals. By joining ChemSec's PFAS movement, companies commit to work towards getting all PFAS chemicals covered by EU’s chemicals legislation, REACH, which lists the harmful chemicals banned from use in the EU, phased out from supply chains.

 

                                                        JOIN    

 

Like a number of other large companies, Greyhound Chromatography has joined the Swedish non-profit organization ChemSecs PFAS movement. The movement is working to have a number of harmful fluorinated compounds – known as “forever chemicals”, since they don’t degrade – phased out and banned.

 

Wellington Laboratories Quality Management

   

The people at Wellington are committed to the distribution of quality products as well as the maintenance of excellent customer service. In fact, in order to provide you with the best possible service, we now have three ISO certifications (ISO 9001:2015, ISO/IEC 17025:2017 and ISO 17034:2016) which cover all aspects of planning, production, testing, distribution, and post-distribution service. 

These certifications allow us to monitor and maintain the highest level of quality and service and also allow our customers to satisfy the requirements of their own ISO certifications. 

Our ISO/IEC 17025:2017 accreditation has been certified by the Canadian Association for Laboratory Accreditation Inc. (CALA) and our scope is available for review on the CALA Directory of Accredited Laboratories (http://www.cala.ca). 

 Similarly, our ISO 17034:2016 accreditation has been certified by ANSI National Accreditation Board (ANAB) and our certificate and scope are also available on their website (http://anab.org/). 

 If you require a hard copy of any of our ISO certificates, please do not hesitate to contact us at info@well-labs.com. 

 

B. CHITTIM	C. TASHIRO	N. RIDDELL

 

         

 

         

 

 

  

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