Indirect complexometric determination of cadmium(II) using citric acid as a masking agent | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

4669617

Reference Type

Journal Article

Title

Indirect complexometric determination of cadmium(II) using citric acid as a masking agent

Author(s)

Bhat, NG; Narayana, B

Year

2012

Is Peer Reviewed?

Yes

Journal

Journal of the Indian Chemical Society
ISSN: 0019-4522

Volume

Issue

Page Numbers

563-565

Web of Science Id

WOS:000304722000017

Abstract

An indirect complexometric method is described for the determination of cadmium(II), citric acid being used as masking agent. Cadmium(II) in a given sample solution is initially complexed with an excess of EDTA and the surplus EDTA is titrated with lead nitrate solution at pH 5.0-6.0 (hexamethylene tetramine), using xylenol orange as indicator. An excess 1% citric acid solution is then added and the EDTA released from the Cd-EDTA complex is titrated with standard lead nitrate solution. Results are obtained for 4.24-21.20 mg of cadmium with relative errors +/- 0.47% and standard deviations <= 0.05 mg. The method is applied for the determination of cadmium in alloys and alloy compositions as well as in its complexes.

Keywords

Cadmium determination; EDTA titration; complexometry; masking; citric acid