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Solvent extraction and spectrophotometric including graphite furnace atomic absorption determination of molybdenum in the environment

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Abstract

A selective and sensitive method for the extraction and microgram determination of molybdenum (VI) with hydroxamic acid as yellow molybdenum-hydroxamate complex from acidic medium is described. The molybdenum-PCPPSAHA complex has λmax 388 nm, molar absorptivity 5.0 × 103l mol−1 cm−1. The system obeys Beer's law in the range of 1–28 μg/ml of molybdenum(VI). Sandell's sensitivity is 0.0192 μg cm2 and stoichiometry of the complex is 1∶2, molybdenum: PCPPSAHA while mixed complex molybdenum-PCPPSAHA-morin has λmax 400 nm and molar absorptivity 5.9 × 103lmo1−1 cm−1 and stoichiometry of the complex is 1∶2∶1.

The molybdenum is determined by graphite furnace atomic absorption spectrophotometry after directly pipetted the extract into the furnace which increases the sensitivity 20 fold.

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Authors and Affiliations

  1. Chemistry Department, School of Sciences, Gujarat University, 380 009, Ahmedabad, India

    Y. K. Agrawal, S. K. Menon & K. R. Patel

Authors
  1. Y. K. Agrawal
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  2. S. K. Menon
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  3. K. R. Patel
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Agrawal, Y.K., Menon, S.K. & Patel, K.R. Solvent extraction and spectrophotometric including graphite furnace atomic absorption determination of molybdenum in the environment. Mikrochim Acta 122, 259–265 (1996). https://doi.org/10.1007/BF01245786

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  • DOI: https://doi.org/10.1007/BF01245786

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