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Updated: Jun 28, 2026

A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry
Published on: January 8, 2016
Determination of methylmercuric ions by photometric titration with dithizone
1Department of Inorganic Chemistry Royal Institute of Technology Stockholm, Sweden.
Abstract:
A rapid photometric titration titration technique, which makes it possible to determine methylmercuric ions with a sensitivity of 15mug, is described. The titration takes place in 80% aqueous ethanol, which is capable of dissolving the titrant, a chloroform solution of dithizone. It has thus been possible to avoid the difficulties arising from co-extraction phenomena that occur when the extractive titration procedures developed for mercury(II) are applied to the determination of methylmercuric ions. A formate buffer is used to keep the pH in the range 2.5-3.0. The attainable precision is considerably better than 1 %.
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