Welchrom GraphiCarb/PSA

Welchrom® GraphiCarb/PSA is composed of the same amount of graphitized carbon black in the upper layer and the same amount of PSA in the lower layer. The packing materials of graphitized carbon black in the upper layer can absorb pigments in the sample matrix, while the PSA in the lower layer can absorb organic acids, fatty acids, pigments and other interferents in the sample. So Welchrom® GraphiCarb/PSA is widely used in the analysis of multi-pesticide residues in food.