Semimicro determination of mercaptans with copper(II).
A rapid and precise titrimetric method for the determination of mercaptans on the semimicro scale is described. Samples dissolved in water, methanol. dimethylformamide or acetonitrile are treated with a measured excess of cupric sulphate. After 1 min, the excess of copper(II) is back-titrated with standard mercaptoacetic acid solution. At the end-point the violet complex first formed changes to a permanent yellow. The method is applicable to a variety of mercaptans and accurate to 0.2%. It is relatively free from interferences.
Bose
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Department of Chemistry, University of Jabalpur, Jabalpur 482001, India.
Sahasrabuddhey
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MP
Verma
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