Spectrophotometric determination of iron with 3-(2-hydroxypheny1)-1H-1, 2, 4-triazole

Abstract

With an object of obtaining a new organic reagent, 3-(2-hydroxyphenyl)-1H-1, 2, 4-triazole was synthesized and its reaction with various metal ions has been investigated. The reagent gave precipitate with mercury (I and II), bismuth and copper (II), while it gave a water-soluble purplered complex with iron (III).
The composition of the iron complex in aqueous solution depends on the pH, whereby the molar ratio of iron and the reagent varies between 1:1, 1: 2 and 1 : 3. By the use of this reagent, the disturbing influence of coexisting substances, except copper and mercury, was found to be very little and the determination of 0.510.0 ppm of iron was possible.