Rapid chelometric determination of lead in lubricating oils via mercaptoacetate extraction.
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.
Banerjee
S
S
Research & Control Laboratory, Durgapur Steel Plant, Durgapur-3, West Bengal, India.
Dutta
R K
RK