黄原酯棉分离富集—原子吸收法快速测定金矿石中的金

The Separation and pre-concentration of Au(Ⅲ)-Rapid Determination of Gold in Ores by Atomic Absorption Spectro photometry

脱脂棉用氢氧化钠处理变成碱纤维,再经二硫化碳作用生成黄原酯棉(ccx)。Ccx在1—10%的稀王水介质中可定量地吸附金离子而与大量的Fe、sb、cu等基体元素分离,含金的黄原酯棉用含有少量硝酸的浓盐酸处理即可使金解脱,溶液中的金用原子吸收法测定,方法简便、快速、适用性广。

Alkali cotton, obtained by treating absorbent cotton with NaOH, reacts with CS2 to form cotton cellulose xanthate (CCX). Au (Ⅲ) is absorbed quantitatively by CCX in 1-10% aqua regia and separated from major matrix elements such as iron, antimony and copper, etc. The absorbed Au(Ⅲ) is desorabed with concentrated hydrochloric acid and nitric acid. The gold in the solution can be determined by AAS. The method is simple and rapid.