Abstract：This paper studied the spectrophotometric properties of the new reagents 4-methylarsenazo-I and 7-(2-aseno-4-methyl)azo-8-hydroxy-5-sulfo-quinoline, and also com-pared them with 5-carboxy-arsenazo-I and 7-(2-aseno-5-carboxy) azo-8-hydroxy-5-sulfo-quinolin
1993, Vol. 17 