Gadiyar, H.R.A.Gadag, R.V.Gajendragad, M.R.2020-03-312020-03-311982Talanta, 1982, Vol.29, 11 SUPPL. 1, pp.941-942https://idr.nitk.ac.in/handle/123456789/10297A simple, rapid, and selective complexometric method is proposed for the determination of mercury(II). Mercury(II) is first complexed with excess of EDTA and the surplus EDTA is back-titrated (pH 5-6) with zinc sulphate solution, with Xylenol Orange as indicator. 4-Amino-5-mercapto-3-propyl-1,2,4-triazole is then added to displace EDTA from the Hg-EDTA complex and the released EDTA is titrated with zinc sulphate solution. Reproducible and accurate results are obtained in the range 1-40 mg of mercury, with a relative error of approximately 0.4%. 1982.Article