• P-ISSN1225-0163
  • E-ISSN2288-8985
  • SCOPUS, ESCI, KCI

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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

논문 상세

    Fluorimetric Determination of Phosphate in Sea Water by Flow Injection Analysis

    분석과학 / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
    1995, v.8 no.4, pp.843-848
    Shoji Motomizu
    Mitsuko Oshima
    Naoya Katsumura
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    Abstract

    A sensitive method for the determination of trace amounts of phosphate by fluorescence-quenching detection / FIA is proposed. The fluorescence of Rhodamine B(RB) was quenched with the formation of the ion associate of molybdophosphate with RB;<TEX>${\lambda}_{ex}$</TEX> and <TEX>${\lambda}_{em}$</TEX> were 560nm and 580nm, respectively. A calibration graph was linear over the ranges from <TEX>$10^{-8}$</TEX> to <TEX>$3{\times}10^{-6}M$</TEX> of phosphate (~0.3~93ppb of phosphorus). The relative standard deviation was 1.2% with <TEX>$8{\times}10^{-7}M$</TEX> phosphate solution and sampling rate was 15 samples / h. The proposed method was applied to the determination of phosphate in sea and river water samples.

    keywords
    Phosphate determination, molybdophosphate-Rhodamine B ion associate, fluorescence quenching, flow injection analysis


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