ベリロンIIIによる亜鉛合金中のベリリウムの吸光光度定量

柴田 正三, 後藤 一男, 天野 武彦, 宮崎 芳洋

doi:10.2116/bunsekikagaku.18.604

ベリロンIIIによる亜鉛合金中のベリリウムの吸光光度定量

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柴田正三
後藤一男

工業技術院名古屋工業技術試験所
天野武彦
宮崎芳洋

日本碍子株式会社

書誌事項

タイトル別名

Spectrophotometric determination of beryllium in zinc base alloy with beryllon III
ベリロン 3 ニヨルアエンゴウキンチュウノベリリウムノキュウコウコウドテイリョウ
ベリリウム用有機試薬(第3報)

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説明

A rapid, sensitive and selective method has been developed for the spectrophotometric determination of micro amounts of beryllium in zinc base alloy. The method is based on the absorptiometric measurement of the stable blue-violet color formed by the reaction of beryllium with beryllon III in an alkaline solution (pH 1011). At 525 mμ, Beer's law is obeyed for 015 μg of beryllium in 50 ml.<BR>The sensitivity and molar absorptivity at 525 mμ are 0.00043μg beryllium/cm³ and 2.0×10⁴, respectively. Large amounts of zinc, aluminum and copper are eliminated by masking them with EDTA and potassium cyanide. The method has been successfully applied to the determination of beryllium(10^-3%) in various zinc base alloys.