Selective adsorption of metal ions on a chelating resin from hydrochloric acid and its application to the analysis of high-purity zinc.

GORAI Yuko, OGUMA Koichi, KOMATSU Yu

doi:10.2116/bunsekikagaku.51.729

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Other Title

キレート樹脂に対する金属イオンの塩酸酸性溶液からの選択的吸着挙動とその高純度亜鉛分析への応用
キレートジュシニタイスルキンゾクイオンノエンサンサンセイヨウエキカラノセンタクテキキュウチャクキョドウトソノコウジュンドアエンブンセキエノオウヨウ

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Abstract

Eporous AS-4 (Miyoshi Oil & Fat Co.) is the trade name given to an arsenic-selective chelating resin of an iminodiacetate polystyrene-divinly benzene copolymer type, which has been modified by successively treating with iron (III) and sodium hydroxide solutions. Iron (III) hydroxide in Eporous AS-4 was removed by washing with 3 mol/l hydrochloric acid to prepare plain Eporous AS-4. The distribution coefficients for Ca^II, Cd^II, Co^II, Cu^II, Fe^III, Mg^II, Ni^II, and Zn^II on plain Eporous AS-4 were measured by a batch method as a function of the hydrochloric acid concentration, and compared with those on other commercially available chelating resins, i.e., Chelex 100 (Bio-Rad Laboratories) and Diaion CR11 (Mitsubishi Chemicals Co.). The distribution coefficients for Cu^II on plain Eporous AS-4 are higher than those on Chelex 100 and Diaion CR11 by a factor of ca. 100 in hydrochloric acid media of less than 0.1 M. The selective adsorption of Cu^II and Fe^III on plain Eporous AS-4 has been successfully applied to the separation of copper and iron in high-purity zinc certified reference materials prior to their measurements by flame atomic absorption spectrometry.

Journal

BUNSEKI KAGAKU

BUNSEKI KAGAKU 51 (9), 729-734, 2002

The Japan Society for Analytical Chemistry

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