A simple, rapid and accurate complexometric method for the determination of palladium(II) is proposed, based on the selective demasking property of 2-mercapto propionyl glycine (MPGH<inf>2</inf>) towards palladium(II). In the presence of diverse metal ions, palladium(II) is complexed with excess of EDTA and the surplus EDTA is back titrated at pH 5-5.5 (acetic acid-acetate buffer) with standard zinc sulphate solution using xylenol orange as indicator. An excess of a 0.2% aqueous solution of MPGH<inf>2</inf> is then added to displace EDTA from Pd(II)-EDTA complex. The released EDTA is titrated with the same standard zinc sulphate solution as before. Reproducible and accurate results are obtained in the concentration range 2-22 mg of palladium with relative error of ±0.36% and coefficient of variation (n=6) not exceeding 0.31%. The effect of diverse ions are studied. The method is used for the determination of palladium in its complexes, catalysts and synthetic alloy mixtures.

Shetty, P.; Nityananda Shetty, A.N.; Gadag, R.V.

A simple, rapid and accurate complexometric method for the determination of palladium(II) is proposed, based on the selective demasking property of 2-mercapto propionyl glycine (MPGH<inf>2</inf>) towards palladium(II). In the presence of diverse metal ions, palladium(II) is complexed with excess of EDTA and the surplus EDTA is back titrated at pH 5-5.5 (acetic acid-acetate buffer) with standard zinc sulphate solution using xylenol orange as indicator. An excess of a 0.2% aqueous solution of MPGH<inf>2</inf> is then added to displace EDTA from Pd(II)-EDTA complex. The released EDTA is titrated with the same standard zinc sulphate solution as before. Reproducible and accurate results are obtained in the concentration range 2-22 mg of palladium with relative error of ±0.36% and coefficient of variation (n=6) not exceeding 0.31%. The effect of diverse ions are studied. The method is used for the determination of palladium in its complexes, catalysts and synthetic alloy mixtures.

dc.contributor.author	Shetty, P.
dc.contributor.author	Nityananda Shetty, A.N.
dc.contributor.author	Gadag, R.V.
dc.date.accessioned	2026-02-05T11:00:30Z
dc.date.issued	Complexometric determination of palladium(II) using 2-mercapto propionyl glycine as demasking agent
dc.description.abstract	2002
dc.identifier.citation	Indian Journal of Chemical Technology, 2002, 9, 2, pp. 127-129
dc.identifier.issn	0971457X
dc.identifier.uri	https://idr.nitk.ac.in/handle/123456789/27994
dc.subject	edetic acid
dc.subject	glycine derivative
dc.subject	palladium
dc.subject	tiopronin
dc.subject	zinc sulfate
dc.subject	accuracy
dc.subject	analytic method
dc.subject	analytical error
dc.subject	article
dc.subject	complex formation
dc.subject	concentration response
dc.subject	reproducibility
dc.title	A simple, rapid and accurate complexometric method for the determination of palladium(II) is proposed, based on the selective demasking property of 2-mercapto propionyl glycine (MPGH<inf>2</inf>) towards palladium(II). In the presence of diverse metal ions, palladium(II) is complexed with excess of EDTA and the surplus EDTA is back titrated at pH 5-5.5 (acetic acid-acetate buffer) with standard zinc sulphate solution using xylenol orange as indicator. An excess of a 0.2% aqueous solution of MPGH<inf>2</inf> is then added to displace EDTA from Pd(II)-EDTA complex. The released EDTA is titrated with the same standard zinc sulphate solution as before. Reproducible and accurate results are obtained in the concentration range 2-22 mg of palladium with relative error of ±0.36% and coefficient of variation (n=6) not exceeding 0.31%. The effect of diverse ions are studied. The method is used for the determination of palladium in its complexes, catalysts and synthetic alloy mixtures.

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