CHROMABOND SPE Columns, HR-XA, 60mg, 3mL, 85µm, 55-65Å Strong quat. ammonium modified polymeric anion exchanger for SPE
Features:
Base material spherical PS/DVB copolymer, pore size 55–65 Å, particle sizes 45 µm or 85 µm (standard),
very large specific surface 850 m2/g, pore volume 1.4 cm3/g, pH stability 1–14
quaternary ammonium modification, exchange capacity 0.25 meq/g, pKa ~ 18
RP capacity 350 mg/g (caffeine in water)
high-purity material, highest reproducibility and lowest blank values due to an optimized production process
outstanding recovery rates especially for the enrichment of acidic analytes
Recommended application:
Acidic active ingredients from strongly matrix-contaminated samples like, e.g., urine, plasma, serum
phenolic acids
acidic herbicides
acids with pKa 2–8
