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Analysis of arsenical insecticides. Part II — Iodimetric determination of copper, arsenate and arsenite

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Summary

Two alternative methods for the estimation of arsenate in presence of arsenite and copper have been developed and are described. These consist of (i) reduction of arsenate to arsenite by fuming with sulphur and sulphuric acid, and estimation of total arsenite after complexing copper with citrate; (ii) removal of copper as cuprous iodide, reduction of arsenate to arsenite by red phosphorus-iodine and estimation of the total arsenite. Both the methods give excellent results and are suitable for the analysis of arsenical insecticides.

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Authors and Affiliations

  1. Division of Analytical Chemistry, National Physical Laboratory of India, New Delhi

    M. R. Verma, V. M. Bhuchar & Ramji Dass

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  1. M. R. Verma
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  2. V. M. Bhuchar
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  3. Ramji Dass
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Verma, M.R., Bhuchar, V.M. & Dass, R. Analysis of arsenical insecticides. Part II — Iodimetric determination of copper, arsenate and arsenite. Z. Anal. Chem. 149, 407–414 (1956). https://doi.org/10.1007/BF00458875

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  • DOI: https://doi.org/10.1007/BF00458875

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