Method for the determination of an amino or aminosulphonic acid

摘要

Method for the determination of an amino benzoic acid or aminosulphonic acid in urine, plasma or serum. The method consists essentially in reacting a urine, plasma or serum sample with a compound of the 4-phenyl-spiro[furan-2(3H)1'-phthalan]-3,3'-dione type or with a compound of the 2-methoxy-2,4-diphenyl-3(2H)-furanone type or with o-phthaldialdehyde and subsequently carrying out a photometric measurement.