PRS is for extracting weak bases in biological fluids. PRS Iis a strong cation exchange sorbent with excellent retention for weakly basic compounds.


  • High recoveries for pyridinic compounds
  • Simple retention mechanism, no non-polar interactions



Carbon content: 4.5%
Surface area: 310 m 2/g
Particle size: 40 - 75 μm
Pore size: 100 Å



  • Determination of drugs and their metabolites in biological fluids
  • Determination of basic pollutants such as malachite green,gentian violet, tetrodotoxin and methylene blue


Related Methods:

  • NY/T 1756-2012   Determination of malachite green in feeds
  • GB/T 20361-2006   Determination of malachite green and gentian violet residues in fishery products - High performance liquid chromatography with fluorescence detector

PRS SPE Cartridges


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