title: Preconcentration of cyanide from water by extraction with tributyltin hydroxide.
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.
authors.affiliation: Department of Chemical Technology, University of Łódź, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Wroński