Dithizonverfahren in der chemischen Analyse. Überblick über die Entwicklung der letzten Jahre

Abstract

AUgemeines.Seit dem Erscheinen der letzten, yon H.

Distribution of copper and zinc in mammalian eyes. Occurrence of metals in melanin fractions from eye tissues

“…The curves, both for Zn and Cu, agree with those given by Fischer & Weyl (1935) and Fischer (1937) for the pure metal dithizonates.…”

Experimental and Density Functional Theory Calculational Studies on 2,3‐Diaryl‐tetrazole‐5‐thione

“…2 The physical and chemical properties of 2,3-diaryltetrazole-5-thione, including synthesis, structure, protonation, electronic absorption spectra et al have been studied by several groups. [3][4][5] In their investigations, the 2,3-diaryl-tetrazole-5-thiones were regarded as mesoionic compounds. However, as far as we know, neither complete theoretical investigations nor the comparison between the calculations and experimental results for derivations of tetrazole-5-thione is available, which attracted our attention and prompted us to make a study.…”

Trace Determination of Copper and Cobalt by Chelate Chromatography and Dithizone Photometry

“…However, in the present work, the lack of specificity would not constitute a drawback because of the prior chromatographic separation. Also, the cobalt dithizonate must be extracted from a basic solution, and under strongly basic conditions the color decays, possibly as a result of the formation of the feebly colored enol tautomer (8). When the extraction is carried out from alkaline solution the removal of excess dithizone from the organic phase is a function of pH.…”