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Updated: Jun 28, 2026

Synthesis of Hypervalent Iodonium Alkynyl Triflates for the Application of Generating Cyanocarbenes
Published on: September 8, 2013
Preconcentration of cyanide from water by extraction with tributyltin hydroxide
1Department of Chemical Technology, University of Łódź, Poland.
Abstract:
Samples of water (500 ml) are extracted with 25 ml of 0.25M tributyltin hydroxide in trichloroethylene, which is then stripped with 2M sodium hydroxide, the organic reagent being used for a further extraction of the water sample; this cycle is carried out four times. The combined sodium hydroxide extracts are then titrated with silver nitrate solution, with p-dimethylbenzylidenerhodanine as indicator. Mean recoveries are around 99%, and the limit of determination is 4 microg/l. Thiocyanate, sulphide, methanethiol and complex cyanides do not interfere.
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