Thio compounds play a vital role in analytical chemistry due to highly sensitive colour reaction, stability and selectivity towards various metal ions1−12. Xanthates have -CS2 group which makes them more reactive towards various metals. These compounds form water-insoluble complexes with most of the metal ions;
therefore, their complexes are either dissolved in water or extracted in a suitable organic solvent for their spectrophotometric determination, which is quite tedious and time consuming, and so there is a need for simpler and more rapid methods. In this method sodium isoamylxanthate has been used as a reagent for the spectrophotometric determination of Co(II), Ni(II), Cu(II), Pd(II), Ru(III) and Mo(VI), which form water insoluble complexes and can be solubilised in micellar media.