Extraktion und photometrische bestimmung von zinn und blei mit 2-(o-hydroxyphenyl)benzthiazolin

The reaction of 2-(o-hydroxyphenyl)benzthiazoline with tin(II) gives bis-(salicylidenamino-2-thiophenolato)-tin(IV); with lead(II), (salicylidenamino-2-thio-phenolato)-lead(II) is formed. The composition of the complexes in solution was determined by the molar ratio, and the gradient ratio methods; the oxidation state of tin was proved by the use of Mössbauer spectroscopy. Both complexes are suitable for the extraction-photometric determination of traces of these metals. The effects of many diverse ions were examined and procedures are given for the determination of tin and lead.