Some heterocyclic azo compounds as analytical reagents 24. 2-(2-Hydroxynaphtylazo)-7-oxo-5,5-dimethyl-4,5,6,7- tetrahydrobenzothiazole as a chelate-forming extraction reagent for copper(II), zinc(II), nickel(II), and cadmium(II)
by: Vačková, Margita, 1931-, et al.