Fig. 8From: Physico-analytical studies on some heterocyclic azo dyes and their metal complexes with some transition metalsAbsorption spectra of PAP azo-dye Ia and their chelates with Co(II), Ni(II), Cu(II), and Zn(II). a dye vs.H2O b Complex vs. H2O c complex vs. dye 1:1 d complex vs. dye 1:2Back to article page