Determination of sulphide, sulphite and thiosulphate with thallic perchlorate or sulphate.
Sulphide, sulphite and thiosulphate can be determined separately or in admixture, with thallic perchlorate or sulphate in acid medium. A sample solution is rendered approximately 0.5 M in acid, 5 ml of 0.05 M KI are added and the solution is titrated to a starch end-point with thallium(III) solution. In another method an acid sample solution is titrated with thallium(III) or iodine solution in the presence of indigo carmine indicator. The end-point is improved in the presence of Co(II).
Sharma
D N
DN
Department of Chemistry, University of Rajasthan, Jaipur, India.
Sharma
P D
PD
Gupta
Y K
YK