Selective complexometric determination of mercury with thiocyanate as masking agent.
A method is proposed for selective complexometrie determination of mercury, thiocyanate being used as masking agent. An excess of EDTA is added and the surplus is back-titrated at pH 5-6 with lead nitrate, Xylenol Orange or Methylthymol Blue being used as indicator. Thiocyanate is then added to decompose the mercury-EDTA complex and the liberated EDTA is titrated with lead nitrate. The interference of various cations has been studied.
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Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad-500258, India.
Raoot
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Kumari
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