All your Chromatography needs from One Single Source

High Quality Reference Standards - ONE SUPPLIER

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, Merck ( Sigma Aldrich, Supelco) , 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

Consolidated Shipments from Multiple Suppliers

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.

MERCK and Cerilliant

Cerilliant is an ISO Guide 34 and ISO/IEC 17025 accredited & ISO 13485 and ISO 9001 certified manufacturer of Certified Reference Standards and Materials. Cerilliant’s catalogue includes a wide range of analytical standards for Forensic, Clinical, Pharmaceutical, Nutraceutical, and Environmental testing and research with an emphasis on Certified Solutions Standards and Certified Spiking Solutions^®.

How to Order Cerilliant Products from Greyhound Chromatography

Cerilliant is now a Sigma Aldrich Company whose parent company is MERCK. You can access MERCK’S range of products from Greyhound’s homepage, www.greyhoundchrom.com Click on the search facility underneath the MERCK logo, locate the product you require, add the item(s) to your basket. If you cannot find the product you are looking for please email sales@greyhoundchrom.com

Analytical Reference Standards available from Chem Service Inc.

Chem Service 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, 1,200 Pesticide and Metabolite Standards (including banned and discontinued items), Phthalate Standards and Vitamin Standards.

Chiron Analytical Reference Standardsa

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.

Natural Plant Based Reference Standards

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

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.

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.

Sigma Aldrich - Merck Full Portfolio available (IN the UK)

MERCK’S product portfolio is available from Greyhound Chromatography for distribution in the United Kingdom. Sigma-Aldrich Laboratory & Production Materials, including Supelco Analytical Products developed by analytical chemists covers a broad range of analytical solutions and every product undergoes meticulous quality control to maintain the integrity of your testing protocols.

• Standards and Certified Reference Materials
• Solid Phase Microextraction (SPME) Fibers and Holders
• Mobile Laboratory MQuant^®Test Strips and RQFlex 20^®
• And more ……..

 How to Order MERCK/Sigma Aldrich Products from Greyhound Chromatography

 MERCK / Sigma Aldrich products can be found within the MERCK portfolio. Access the MERCK product portfolio from the home page of the Greyhound Chromatography website by using the search facility under the MERCK Authorised Distributor Logo and either assemble a basket in the e-commerce store or email a list of your requirements to sales@greyhoundchrom.com

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

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.

Premium Quality Reference Standards from Paragon Scientific

 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.

MERCK RTC Reference Standards

Sigma-Aldrich RTC products include high quality Certified Reference Materials (CRMs), Quality Control (QC) Samples, and Proficiency Testing (PT) Samples. RTC has more than 20 years of experience and strong expertise in the environmental and pharmaceutical sectors. Quality systems are based upon the accreditation to ISO/IEC 17025:2005, ISO Guide 34:2009, ISO/IEC 17043:2010 and registration to ISO 9001:2008.

How to Order RTC Products from Greyhound Chromatography

Sigma Aldrich is now a MERCK company, therefore RTC products can be found within the MERCK portfolio. Access the MERCK product portfolio from the home page of the Greyhound Chromatography website by clicking on the MERCK Authorised Distributor Logo and either assemble a basket in the e-commerce store or email a list of your requirements to sales@greyhoundchrom.com we will then provide a quotation and a 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

Greyhound Chromatography is the authorised distributor of Wellington Laboratories’ products throughout Europe and the Middle East. If you are not within our territory we will forward your enquiry to the distributor responsible for your country.

Frequently Asked Questions

 Why do I need to register to your website to see prices?

We ask you to register to our website so we know who you are and the nature of your business. We make every effort to ensure that we are supplying our products appropriately to comply with current legislation.

I’m a re-seller and participate in Tenders and RFQs, can you provide assistance with the application process?

Our Sales Team will be happy to assist you, either by providing technical knowledge or advice about the suitability of products. We will always provide you with the best prices for the products and will recommend the most cost effective solution for the transport of goods.

Do you have personnel that can advise on the shipment of our goods and Customs Documentation?

Our highly trained logistics team regularly advise clients on current shipping regulations and Customs documentation to ensure shipments meet current IATA, IMDG and ADR requirements and are delivered on time.

 

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Gas Purifiers, Filters and Traps Supplied by Greyhound Chromatography

Gas Purifiers and Filters are supplied in two designs, In-line and Base Plate.

CRS ZPure Glass In-line Gas Purifiers are convenient point-of-use purifiers with high sensitivity visual indicators for oxygen and water breakthrough. They are available with compression or quick connect fittings in brass and S/S.   The glass body is shielded by an outer polycarbonate protective body.

CRS ZPure Metal In-line Gas Purifiers are high-efficiency traps with outstanding capacity. High quality activated adsorbents ensure long purifier life and efficient contaminant removal. Available in 4 sizes of stainless steel cylinders and with a wide range of compression, quick-connect and push-to-connect fittings.

Trajan Base Plate Cartridge Gas Purifiers are upright filters attached to a metal base plate. Each cartridge consists of adsorbent packed into a transparent and virtually unbreakable, heavy-walled polycarbonate housing. The cartridges can be changed without any fear of oxygen entering the system due to the spring-loaded check valves built into the base plate. Their design means they can directly replace other brands of cartridge gas purifiers.

Trajan Big Trap In-Line Gas Purifiers are designed for bulk purification applications or where several instruments are plumbed from a single source. Manufactured from one-piece heavy walled aluminium tube with a 750cm3 capacity.

VIEW THE FULL RANGE OF PURIFIERS FILTERS AND TRAPS

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We are proud to represent Paragon Scientific premium quality reference materials in our online catalogue. 

Items include Density, Flash Point, Liquid Colour, Refractive Index, TAN/TBN and Viscosity standards and Sulfur Certified Reference Standards.

Sulfur Certified Reference Standards PDF

Introducing Sulfur Certified Reference Materials

Paragon Scientific can now manufacture premium level, dual accredited Certified
Reference Materials (CRMs) for Sulfur analysis, certified in strict accordance with
both ISO/IEC 17025 and ISO/IEC 17034 as per their accreditation to the United
Kingdom Accreditation Service (UKAS).

Paragon Scientific's Sulfur Certified Reference Materials

Paragon Scientific’s Sulfur CRMs are suitable for calibration, verification or for use in quality control procedures used for analysing sulfur content in petroleum products. Our opening range includes sulfur in light mineral oil, heavy mineral oil, and in synthetic diesel, with sulfur content ranging from 0 (Blank) through to 5.0000 % (50000 ppm) for each material. More matrices are to be launched in the near future, including sulfur in kerosene, iso-octane and more.

Each Sulfur CRM provides traceability of measurement to recognised national standards, and to units of measurement realised at the National Physics Laboratory (NPL) or other recognised national standards laboratories. All sulfur content values are traceable to National Institute Standards and Technology (NIST), and each CRM provides low levels of uncertainty, ensuring maximum accuracy of data at hand.

Paragon Scientific’s Sulfur CRMs are available in 100 mL volume glass containers with tamper-evident packaging, providing assurance of sample integrity. Paragon also offers set sulfur kits for each matrix and the appropriate test methods associated, providing easy and efficient procurement solutions for end-users.

Key Benefits

• Certified in strict accordance to ISO 17025 and ISO 17034 under UKAS accreditation
• Highest level of accreditation guarantee, providing the most credible certified data available worldwide
• Suitable for, but not limited to, internationally recognised test methods and protocol: ASTMD2622, ASTM D4294, ASTM D7039, IP 336, IP 496, IP 497
• Fully traceable to international standards and low levels of uncertainty achieves maximum accuracy of data
• Suppliedf in 100mL volume, tamper-evident glass packaging, providing assurance of sample integrity
• Manufactured in the United Kingdom
• 12 Month shelf life

• Why Choose Paragon
  
  

All of Paragon’s products have been manufactured to the highest certification integrity coupled with premium quality. Every certificate provides low levels of uncertainty of measurement and is fully traceable to
international methodology. With an excellent reputation across multiple industries, Paragon provides excellent customer service, technical support and prompt delivery to all its customers.

Paragon Scientific has always sought to certify its products to the highest metrological level it can achieve, this has been one of its key objectives since the company was founded and has set them apart from other reference material producers.

Integrity and Quality has and always will be at the forefront for Paragon Scientific, which is evidenced by their accreditations to ISO 17025 and ISO 17034 under UKAS and the long-standing relationships with end-
users and the worldwide partners they work with. Integrity and Quality are embedded across all their business activities and provides the framework in how they approach new ideas and operate.

Background

Petroleum, or crude oil, is a valuable commodity because it is the feedstock for a wide range of products from fuels to plastics. Sulfur and its organic compounds are impurities found in crude oil, petroleum products
and feedstock. The sulfur levels in these products vary from the highest amounts in the crude oils to trace levels in road fuels.

Sulfur oxides formed during the combustion of gasolines or diesel fuels in internal combustion engines are damaging to the engine and to the environment. In the atmosphere, sulfur oxides convert to sulfuric acid by
reaction with moisture, and harm vegetation, aquatic, animal and human life. Consequently, ultralow sulfur diesel (ULSD) fuel sold in North America must contain less than 15 ppm sulfur. The sulfur content limit in
Europe is even lower, at 10 ppm. Similar sulfur content limits are being adopted by other parts of the world to reduce air pollution and other environmental impacts.

Quantitative analysis of sulfur in crude oil, petroleum products and feedstock is extremely important to ensure compliance with regulatory bodies and legislation, failure to do so can result in costly fines. Analysis
techniques for sulfur content measurement include wet chemistry, X-ray fluorescence, atomic spectroscopy and various thermal combustion methods with different detection limits. Regardless of the technique
employed for measurement, robust analytical data is paramount, calibration and / or verification. The use of high quality CRMs certified to ISO 17025 and ISO 17034 is critical to ensuring confidence of the
measurement results achieved.

About Paragon Scientific

 Founded in 1994, Paragon Scientific have developed an international reputation synonymous with quality, prompt delivery, affordability, and a first class customer service. A combination of advanced manufacturing techniques, the use of Primary laboratory test equipment and  acute attention to detail enables them to produce reference materials with some of the lowest levels of uncertainty of measurement available. Their products are used in multiple industries throughout the world.

Accreditation
Our viscosity standards, viscometer calibration, density standards and sucrose RI standards are all covered by our United Kingdom Accreditation Service (UKAS) accreditation to the International Standard BS/EN/ISO/IEC 17025 - 2005, in addition to this our Refractive Index standards are manufactured conforming to ICUMSA (1974). For more information about UKAS and to view our scope of accreditation (Calibration Laboratory number 0649) please visit www.ukas.org/calibration

What is ISO 17025?
ISO 17025 is a recognised international standard that specifies the requirements for the competence to carry out testing and or calibrations to a standard dictated by international methods. The international standard requires that an accredited facility comply with all the requirements detailed within the varied sections of the standard. These sections range from assuring the quality of test and calibration results to accommodation, environmental conditions, and purchasing. ISO17025 is applicable to laboratories that operate in a multitude of business sectors, some of which include automotive, cosmetics, micro-electronics, petro-chemical, pharmaceutical and power generation.

What is ISO Guide 34?
ISO Guide 34 provides the highest level of Quality Assurance, confirming the expertise of the manufacturer, the integrity of the production systems and the reliability of the Certified Reference Materials that it produces.

For detailed information on Paragon's ISO 17025 accreditation click here: 
http://www.ukas.org/calibration/lab_detail.asp?lab_id=119&location_id=&vMenuOption=1

For detailed information on Paragon's ISO Guide 34 accreditation click here: 
http://www.ukas.com/about-accreditation/accredited-bodies/Reference-Material-Producers.asp


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 If you have any Paragon product requirements please do get in touch with our sales team. Simply email sales@greyhoundchrom.com or call +44 (0) 151 649 4000

CONTACT US   

Tel:        +44 (0) 151 649 4000   

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Q-Fil Certified Syringe Filters

Q-Fil Certified Syringe Filters set the new Quality standard for today’s laboratory syringe filters Manufactured from the highest quality medical grade high density polypropylene, Q-Fil Certified Syringe Filters provide excellent chemical compatibility with acids, alcohols, bases, ethers, glycols, ketones and oils, with maximum operating temperatures of 135°C.

Every colour-coded filter is printed with the individual batch number, details of the membrane material and its pore size, on the outside rim of the filter, making them unique for traceability, GLPs and validation purposes.

BUY HERE

Why filter your samples for HPLC?

• To protect the HPLC column, the column inlet frits and capillary columns against blockage (plugging) caused by particulate matter in the sample
• To protect injection valves from damage caused by scratching and wear of the valves internal components, caused by harmful particulate matter in the unfiltered sample, thereby reducing instrument downtime.

About our Quality Control procedures

• Every batch of filters is tested by an independent laboratory to ISO 17025 quality procedures

• Every individual Q-Fil Certified Syringe Filter is visually inspected to ensure it meets our manufacturing and quality control specifications
• Samples of all our syringe filters and their respective raw technical data are stored for a period of 5 years from the date of manufacture for future reference
• Each batch of filters is tested prior to release for
- External Dimensions
- Bubble Point
- Burst Pressure
- Filter Integrity
- Water Flow Rate
- UV Extractables and compliance with all technical procedures

Why use Greyhound Q-Fil Certified Syringe Filters?

• Q-Fil Certified Syringe Filters are manufactured in compliance with ISO 9001:2000 quality procedures

• Every box is supplied with a Certificate of Analysis and Conformance to guarantee its batch to batch quality and performance
• The unique encapsulating process developed for these filters, forces the sample to pass only through the membrane, thus avoiding the possibility of leaks or contamination
• Available in the most popular sizes, porosities and membrane types
• Excellent resistance to all routinely used HPLC solvents
• Filter housings are manufactured from high density medical grade polypropylene
• Extremely low level of extractables for highly sensitive work
• Luer connections fully comply with ISO 594-1
• Filters are available with standard and ‘SlimTip’ sized outlets

Selecting the right Q-Fil Certified Syringe Filter

• 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 fibre pre-filter
• Choose the type of membrane based on the solvent being filtered.

Filter Sizes

All our filters have female Luer Lock inlets and are available in three diameters -

25mm Diameter
Designed for large sample volumes or solvent filtration
Wide cross sectional area 3.55cm2
Maximum filtration volume >10ml
Maximum operating pressure 550 Kpa

13mm Diameter
Suitable for most applications
Filtration area of 0.95cm2
Maximum filtration volume 1 to 10ml Maximum operating pressure 750 Kpa Now available with ‘SlimTip’ (ST) outlet

4mm Diameter
Suitable for most applications Ideal for small samples <1ml Pore sizes of 0.20µm and 0.45µm
SlimTip Filters (ST)
13mm diameter syringe filters are now available with the new ‘SlimTip’ outlet for direct filling of microvials.

Pore Sizes

Q-Fil Certified Syringe Filters are available in 0.20µm and 0.45µm pore sizes. The 0.20µm 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 (page 6) have a glass microfibre membrane which is chemically inert and resists most solvents. Q-Fil glass microfibre pre-filters are recommended for removing large particulates from the sample and are ideal for dissolution tests.

Glass microfibre membranes are also available mounted before the microporous filter membrane in the polypropylene housing. The glass pre-filter removes the larger particulates and prevents premature clogging of the filter.

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 Why Use a Pipette?

A common tool within a laboratory environment, pipettes are primarily used for the transportation and measurement of various substances. Also referred to as chemical droppers, while they’re not the first thing that comes to mind when thinking about processes such as gas chromatography, they’re immensely important, offering uses that other similar types of lab equipment do not.

Most scientific experiments or processes will make use of plastic pipettes, but it’s also possible to use glass pipettes, with the only difference between the two being a rubber head used at one end of a glass pipette to pull and push a substance in and out of it. With plastic pipettes, on the other hand, you can simply squeeze the larger end of the pipette to do this.

An alternative to both of these traditional types of pipettes are electronic pipettes, where multiple samples can be taken at once. This makes syringing, measuring and transporting chemicals quicker, easier and more accurate.

Why use a pipette instead of a measuring cylinder?

It’s common to use measuring cylinders for handling potentially harmful substances, but there are advantages to using a pipette instead. Unlike a measuring cylinder, a pipette will be more accurate with all of the sample, accounting for every drop of the substance being held within the tool. If there’s a few drops of the sample at the side of the measuring cylinder, these aren’t guaranteed to be included in the total measurement, but a pipette will be as accurate as possible, especially when using an electronic pipette.

Health and safety factors when using a pipette are also far less of a concern than they would be when using a measuring cylinder due to how the substances are held. A measuring cylinder is a traditional way of handling, measuring and transporting fluids within a laboratory, but the risk of spillages can be a concern. Choosing to use a pipette means that instead of the substance potentially flowing over the edges of the cylinder, they should remain secure and easily under control inside the pipette, even when being moved around a lab.

How does a pipette measure?

A typical plastic pipette works as a vacuum, with fluid drawn in and out of the tool by squeezing the ‘bulb’. Marked units are clearly labelled along the shaft of this type of pipette, making the process of recording measurements simple. You’ll often find milliliters as the unit of measurement on a plastic or glass pipette - usually ranging from between 0.25 and 1 centimetre - with electronic pipettes going as low as 50 microlitres, which equates to as little as 0.05 milliliters.

Electronic pipettes are recognised as being even more accurate than traditional pipettes. The latest electronic pipettes offer a whole range of different settings, meaning that you can set up what you want them to do and they’ll draw in the substance to your exact specifications. Even processes such as dilution and titration are provided as options, and you’re able to choose the exact amount of fluid you want it to draw in if you’re restricted to specific measurements. Additionally, you will be able to control the speed at which you’re drawing a fluid in and out of your pipette, which is ideal if you’re handling a particularly volatile substance.

CONTACT US   

Tel:        +44 (0) 151 649 4000   

Web:     www.greyhoundchrom.com   

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