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Issue 1, 1991
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Masking of zirconium(IV) in the determination of fluoride with an ion-selective electrode: application to zirconium(IV) fluoride-based glasses

Akio Yuchi,  Jun-ichi Baba,  Hiroko Wada  and  Genkichi Nakagawa 

Abstract

The performance of six chelating reagents [ethylenediamine-N,N,N′,N′-tetraacetic acid (EDTA); trans-1,2-cyclohexanediamine-N,N,N′,N′-tetraacetic acid (CDTA); N′-(2-hydroxyethyl)ethylenediamine-N,N,N′-triacetic acid (HEDTA); triethylenetetraamine-N,N,N′,N″,N‴,N‴-hexaacetic acid (TTHA); diethylenetriamine-N,N,N′,N″,N‴-pentaacetic acid (DTPA); and citrate] has been studied for masking zirconium(IV) in the determination of fluoride with an ion-selective electrode. Citrate was not suitable because it produced a prolonged electrode response. Of the aminopolycarboxylates, DTPA has a much greater masking ability than the others. Using DTPA at pH 5–6, fluoride was successfully determined at a concentration of 1 × 10–5 mol dm–3 in the presence of up to 4 × 10–6 mol dm–3 zirconium(IV). The proposed method was applied to the analysis of a number of zirconium(IV) fluoride compounds and ZrF4-based glasses after fusion with sodium carbonate.

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Article type: Paper
DOI: 10.1039/AN9911600045
Citation: Analyst, 1991,116, 45-48
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    Masking of zirconium(IV) in the determination of fluoride with an ion-selective electrode: application to zirconium(IV) fluoride-based glasses

    A. Yuchi, J. Baba, H. Wada and G. Nakagawa, Analyst, 1991, 116, 45
    DOI: 10.1039/AN9911600045

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