A complexometric method for the determination of cadmium(II) in presence of other metal ions is described based on the selective masking ability of 2-mercaptoethanol towards cadmium(II). Cadmium and other ions in a given sample solution are initially complexed with excess of EDTA and the surplus EDTA is titrated with lead nitrate solution at pH 5.0-6.0 (hexamethylentetramine), using xylenol orange as indicator. A known excess of 2-mercaptoethanol solution (10% alcoholic) is then added, the mixture is shaken well and the released EDTA from the Cd-EDTA complex is titrated against standard lead nitrate solution. The interferences of various ions are studied and the method is applied to the determination of cadmium in its complexes. Reproducible and accurate results are obtained for 3.5-25 mg of Cd with relative errors ? 0.65% and standard deviations ? 0.06 mg.

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dc.contributor.authorMuralidhara Rao, B.
dc.contributor.authorNityananda Shetty, A.N.
dc.date.accessioned2026-02-05T11:00:33Z
dc.date.issuedComplexometric Determination of Cadmium Using 2-Mercaptoethanol as Masking Reagent
dc.description.abstract1998
dc.identifier.citationMicrochimica Acta, 1998, 130, 1, pp. 103-104
dc.identifier.issn263672
dc.identifier.urihttps://doi.org/10.1007/bf01254597
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/28041
dc.publisherSpringer New York
dc.subject2-mercaptoethanol
dc.subjectCadmium determination
dc.subjectComplexometry
dc.subjectEDTA titration
dc.subjectMasking
dc.titleA complexometric method for the determination of cadmium(II) in presence of other metal ions is described based on the selective masking ability of 2-mercaptoethanol towards cadmium(II). Cadmium and other ions in a given sample solution are initially complexed with excess of EDTA and the surplus EDTA is titrated with lead nitrate solution at pH 5.0-6.0 (hexamethylentetramine), using xylenol orange as indicator. A known excess of 2-mercaptoethanol solution (10% alcoholic) is then added, the mixture is shaken well and the released EDTA from the Cd-EDTA complex is titrated against standard lead nitrate solution. The interferences of various ions are studied and the method is applied to the determination of cadmium in its complexes. Reproducible and accurate results are obtained for 3.5-25 mg of Cd with relative errors ? 0.65% and standard deviations ? 0.06 mg.

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