Spectrophotometric Determination of Gallium(III) with 4-(2-Pyridylazo)-resorcinol and Nitron

by Petya Vassileva Racheva, Kirila Trifonova Stojnova, Vanya Dimitrova Lekova, Atanas Nikolov Dimitrov
Published 2015-07-01

Extraction-Chromogenic System for Cobalt Based on 5-Methyl-4-(2-thiazolylazo)resorcinol and Benzalkonium Chloride

by Danail Georgiev Hristov, Petya Vassileva Racheva, Galya Konstantinova Toncheva, Kiril Blazhev Gavazov
Published 2021-03-01