Abstract
The direct injection enthalpimetry was applied to the determination of sulphides, thiourea, dithiocarbamates, dithizone and benzothiazole by means of catalytic iodine-azide reaction in non-aqueous media. The determined compounds are injected into the iodine-azide solution in dimethylformamide, dimethylsulphoxide, formamide and into the mixture of these solvents. The catalytic reaction takes place immediately on injection of the samples and terminates within 2 min. The rise in temperature is monitored with a thermistor in a Wheatstone bridge circuit and the curve resistance change-time was the basis for the calculation of investigated concentration of sulphur catalysts.
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