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Rapid chelometric determination of lead in lubricating oils via mercaptoacetate extraction
1Research & Control Laboratory, Durgapur Steel Plant, Durgapur-3, West Bengal, India.
Abstract:
A rapid complexometric method for the estimation of lead in lubricating oil has been developed. The lead naphthenate present in the oil is extracted with a mixture of dilute thioglycollic acid and nitric acid. The aqueous extract containing lead mercaptoacetate is titrated with EDTA at pH 5 with Xylenol Orange as indicator. The lead content can be determined within 15-20 min.
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