论文部分内容阅读
从锡矿石中测定伴生微量元素,主要采用加碘化铵分离锡.卢国仪等人,在两次氢氧化钠熔矿时加入碘化铵灼烧除锡后,完成微量锆的比色测定.由于锡精矿中含锡量高达50％以上,又极易水解,对于微量稀土元素的偶氮肿Ⅲ比色测定有严重干扰.脂肪酸萃取稀土元素已有报道.但用来萃取锡精矿中微量稀土元素未见报道. 本文指出,脂肪酸用来萃取锡矿石中微量稀土元素有很高的选择性,不因多次分离而损失,只需一次萃取分离后,直接进行比色测定.本文研究了在pH4.0～5.5的饱和硝酸
Determination of associated trace elements from the tin ore, the main separation of tin with iodine iodide.Lu Guoyi et al, in the two sodium hydroxide melt iodine burning after the addition of tin, the completion of the determination of trace zirconium color due to Tin concentrates containing more than 50% of the tin content, but also easy to hydrolyze, for a small amount of rare earth elements azo-swollen Ⅲ colorimetric determination of a serious interference. Fatty acid extraction of rare earth elements have been reported. But for the extraction of tin concentrate Rare earth elements have not been reported.This paper pointed out that fatty acids used to extract trace amounts of rare earth elements in tin ore have a high selectivity, not because of the loss of multiple separation, only one extraction separation, direct colorimetric determination.In this paper, Saturated nitric acid at pH 4.0 ~ 5.5