Spectrophotometric determination of palladium and bismuth(III) with semimethylxylenol blue.

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概要

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• Procedures are described for the spectrophotometric determination of palladium and bismuth(III) with Semimethylxylenol Blue (SMXB). SMXB reacts with palladium and bismuth(III) to form reddish-violet 1:1 complexes. The optimum pH ranges for the color development are pH 1.0–1.7 for palladium and pH 1.0–1.4 for bismuth(III). The absorption maxima of the colored solutions lie at 565–568 nm and at 568–570 nm, respectively. Beer's law is obeyed over the range of 0.4–3.2 μg cm<SUP>−3</SUP> of palladium and 0.4–4.0 μg cm<SUP>−3</SUP> of bismuth(III), and the sensitivities of the determinations are 4.0×10<SUP>−3</SUP> μg Pd cm<SUP>−2</SUP> and 6.1×10<SUP>3</SUP> μg Bi cm<SUP>−2</SUP> for 0.001 of absorbance. For the palladium determination, gallium, tin(IV), bismuth(III), scandium, zirconium, and iron(III) interfere, but tin(IV), scandium, zirconium, and iron(III) can be masked by the addition of fluoride. For the bismuth(III) determination, gallium, tin(IV), scandium, zirconium, and iron(III) interfere, but the effect of iron(III) is eliminated by the addition of L-ascorbic acid, and tin(IV) and scandium can be masked by fluoride. A consecutive determination of palladium and bismuth(III) by the difference of the rates of color developments for their complexes was also studied.

• 公益社団法人 日本化学会の論文

著者

• Ueda Joichi

  Department Of Chemistry Faculty Of Education Kanazawa University

• Kadowaki Kyoko

  Department of Chemistry, Faculty of Education, Kanazawa University

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