陰イオン交換樹脂による鉱石中の亜鉛の定量

久田 正典, 柏川 嘉一

doi:10.2116/bunsekikagaku.8.235

陰イオン交換樹脂による鉱石中の亜鉛の定量

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久田正典

三菱金属鉱業(株)明延鉱業所
柏川嘉一

三菱金属鉱業(株)明延鉱業所

書誌事項

タイトル別名

Determination of zinc in ore by the use of anion exchange resin
インイオンコウカンジュシニヨルコウセキチュウノアエンノテイリョウ

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説明

In order to simplify and speed up the determination of zinc in ore, the authors have developed method which involves the use of an anion exchanger (Amberlite IRA-410) for the separation of zinc from other elements, and the use of EDTA in the succeeding titration. A ver ygood adsorption of zinc is obtained in 0.12N HCl containing 100 g of NaCl per liter. In order to elute the zinc quantitatively, a solution of 1N NH₄OH containing 20 g of NH₄Cl per liter is passed through the column of resin. Metals often associated with Zn in ore, such as Fe, Cu, Mn, Al, and alkaline earths, are not adsorbed on the resin in the HCl-NaCl medium. Although Pb is adsorbed on the resin, can be removed by the usual method. Less than 50 mg of Cd does not interfere with the titration if a small amount of sodium diethyl-dithiocarbamate is added. In general, the ores can be analysed by this method with reliable results (see Table 9). The time required for the analysis is about 45 hours.