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Separation and Spectrophotometry Determination of Trace Molybdenum(VI) with 5-Octyloxymethyl-8-quinolinol in Large Amounts of Diverse Ions

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Abstract

Molybdenum(VI) can be completely extracted with 2.0×10-2 mol dm-3 5-octyloxymethyl-8-quinolinol (HO8Q) into chloroform from 3.0 mol dm-3 nitric acid solution to give a yellowish complex absorbing at 380 nm with the molar extinction coefficient of 1.14×104 mol-1 dm3 cm-1. The extracted molybdenum(VI)-HO8Q complex is formulated as MoO2(O8Q)2. A 5-octyloxymethyl-8-quinolinol was able to simply and selectively separate and spectrophotometrically determine molybdenum(VI) in the presence of large amounts of such metal ions as iron(lll), nickel(ll), cobalt(ll), zinc(ll), cadmium(ll), lead(ll), niobium(IV), gallium(lll), thallium(l) and copper(ll). These ions did not interfere with the determination of molybdenum(VI) with HO8Q. The present method was satisfactorily applied to the spectrophotometric determination of molybdenum in an NBS standard steel sample. The extraction behavior of molybdenum(V) with HO8Q was also described.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Ibaraki Univesity, Mito, 310, Japan

    Kousaburo Ohashi, Makoto Inose & Katsumi Yamamoto

  2. Department of Environment, General Education, Ibaraki University, Mito, 310, Japan

    Kenji Nakamura

Authors
  1. Kousaburo Ohashi
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  2. Makoto Inose
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  3. Kenji Nakamura
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  4. Katsumi Yamamoto
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Ohashi, K., Inose, M., Nakamura, K. et al. Separation and Spectrophotometry Determination of Trace Molybdenum(VI) with 5-Octyloxymethyl-8-quinolinol in Large Amounts of Diverse Ions. ANAL. SCI. 2, 439–442 (1986). https://doi.org/10.2116/analsci.2.439

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  • DOI: https://doi.org/10.2116/analsci.2.439

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