3,7-ジヒドロキシフラボンによるアンチモンのけい光定量

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書誌事項

タイトル別名
  • ３，７‐ジヒドロキシフラボンによるアンチモンのけい光定量
  • Fluorometric determination of antimony with 3, 7-dihydroxyflavone
  • 3 7 ジヒドロキシフラボン ニヨル アンチモン ノ ケイコウ テイリョウ

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抄録

Fluorescent reaction of, antimony (III) with 3-hydroxyflavone and its twelve hydroxyl and methoxyl derivatives was studied. All these reagents react with antimony (III) to form the soluble complexes, which show strong fluorescence in perchloric or sulfuric acid, weak fluorescence in phosphoric acid and no fluorescence in hydrochloric acid. The insertion of hydroxyl or methoxyl group into the 2'-, 3'-, or 5-position of 3-hydroxyflavone decreases the fluorescence intensity, whereas the insertion of these groups into the 4'- or 7-position greatly increases the intensity. The recommended acid and reagent for the fluorometric determination of antimony (III) are perchloric acid and 3, 7-dihydroxyflavone, respectively, and the complex has a maximum excitation at 395 nm and emission at 456 nm in 1 M perchloric acid. Analytical procedure is as follows: To a solution containing (0.12.0)μg of antimony (III), 2.5 ml of methanolic 1×10-3 M solution of reagent, 10 ml of methanol (the final content is 50 vol %) and 5 ml of 5 M perchloric acid are added, and the mixture is diluted to 25 ml with water. The fluorescence of longer wavelength than 430 nm is measured exciting at 405 nm by mercury line against 1 μg/ml aqueous solution of sodium fluorescein. The analytical curve is linear in the range above-mentioned. The coefficient of the variation obtained in five measurements was 1.1% for 1.22 μg of antimony (III). The molar ratio of antimony (III) to reagent in the complex is 1:1. In the determination of 1.50 μg of antimony (III), sulfate, nitrate, phosphate and acetate (up to 100 mg), EDTA, chloride, oxalate, tartrate and citrate (1 mg), Be, Mg, Ca, Sr, Ba, Cu, Ag, Zn, Cd, Pb and As(III, V) (10mg), Cr (III), Ni, Co and Pd (1 mg), Au, Tl(III), Ti, V and W (100μg), Hg (II), Al, In, Bi, Nb and Fe (III) (10μg) do not interfere with the determination, but Sn (IV), Zr, Hf, Ga and Ge give positive errors to a large extent.

収録刊行物

  • 分析化学

    分析化学 29 (11), 780-785, 1980

    公益社団法人 日本分析化学会

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