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Extraction-spectrophotometric determination of nickel as Ni-(PAR)2-(CTAB)2 complex in polymetallic sea-bed nodules and steels

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Abstract

A red, water-soluble complex of nickel with PAR can be extracted into chloroform with CTAB at pH 7.0. The system obeys Beer's law upto 0.5 μg/ml with a molar absorptivity of 45 200 L·mol−1·cm−1 at 540 nm. Job's method of continuous variations revealed that the composition of the extracting species is 1:2:2 for nickel:PAR:CTAB. Based on this extraction, a highly sensitive and selective spectrophotometric method for the determination of nickel in polymetallic sea-bed nodules and in steels, after prior separation of iron and manganese, was developed. The standard deviation was 0.04–0.127 μg for 5–25 μg of nickel.

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Authors and Affiliations

  1. Department of Chemistry, Ranchi University, Ranchi, India

    S. N. Bhadani & Madhu Tewari

  2. Analytical Chemistry Division, National Metallurgical Laboratory, 831 007, Jamshedpur, Bihar State, India

    Archana Agrawal & K. Chandra Sekhar

Authors
  1. S. N. Bhadani
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  2. Madhu Tewari
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  3. Archana Agrawal
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  4. K. Chandra Sekhar
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Bhadani, S.N., Tewari, M., Agrawal, A. et al. Extraction-spectrophotometric determination of nickel as Ni-(PAR)2-(CTAB)2 complex in polymetallic sea-bed nodules and steels. Fresenius J Anal Chem 349, 478–481 (1994). https://doi.org/10.1007/BF00322940

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  • DOI: https://doi.org/10.1007/BF00322940

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