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Determination of lead by the precipitation of lead molybdate from a homogeneous solution by the diffusion method

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Abstract

A satisfactory quantitative method for the determination of lead as lead molybdate by precipitation from a homogeneous solution has been developed. The method employs the diffusion of ammonia into a solution containing lead and sodium molybdate in nitric acid medium. The precipitation of lead in the range of 28·0–280·0 mg is complete within 8–9 hours. Anions like sulphate, arsenate, phosphate, tungstate and chromate in moderate concentrations and cations such as Zn (II), Cu (II), Ni (II), Co (II), Mn (II), Cd (II), Hg (II), Ag (I), Ti (IV), As (V), Mg (II) and Al (III) do not contaminate the precipitate. The precipitate gets constant weight at 120°. This eliminated the ignition of the precipitate,i.e., the contamination of molybdic oxide by the precipitate was reduced.

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References

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Authors and Affiliations

  1. Department of Chemistry, Andhra University, 530003, Waltair

    Somasekhara Rao Kaza

  2. Department of Chemistry, Government College of Engineering and Technology, 492001, Raipur

    Vishnu Gopalarao Vaidya

Authors
  1. Somasekhara Rao Kaza
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  2. Vishnu Gopalarao Vaidya
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Kaza, S.R., Vaidya, V.G. Determination of lead by the precipitation of lead molybdate from a homogeneous solution by the diffusion method. Proc. Indian Acad. Sci. 84, 52–56 (1976). https://doi.org/10.1007/BF03046641

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  • DOI: https://doi.org/10.1007/BF03046641

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