Welchrom PA

Adsorbent of Welchrom® PA column is polyamide, a polymeric compound containing amide groups in the molecular backbone repeating unit, commonly known as "nylon". Amide groups can form hydrogen bonds with polar compounds and have a good adsorption and retention effect on polar compounds. Both column and packing materials are suitable for the determination of synthetic colorants in food such as lemon yellow, new red, amaranth red, carmine red, sunset yellow, bright blue and so on or the removal of pigment in samples.