Lumex Instruments Group

Application - Determination of 4-carboxybenzaldehyde & p-toluic acid in purified terephthalic acid according to ASTM D7881 & ASTM D7882 test methods - Brochure

Introduction These test methods cover the determination of 4-carboxybenzaldehyde (4-CBA, 4-formylbenzoic acid) and p-toluic acid (p-TOL, 4-methylbenzoic acid) in purified terephthalic acid (PTA) by capillary electrophoresis (CE) with normal or reverse voltage mode and UV detection.