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磷矿中氟,氯、碘的定量分析,通常采用分别取样,碱熔测定,手续比较麻烦。有人早已报导离子交换树脂可在水溶液中分解难溶块,文献介绍可以分解磷灰石,并用于测定氟。其后,则未见有实际应用的报导。我们在此基础上,详细地试验了用国产732型阳离子交换树脂分解磷矿的条件。试验证明,在分解样品后所得的溶液中,由于阳离子被分离除去,可以直接分取溶液采用一般方法测定氟,氯和碘。手续简便,效果较好。
Phosphate rock fluoride, chlorine, iodine quantitative analysis, usually by separate sampling, alkali melting determination, procedures more trouble. It has long been reported that ion exchange resins can decompose difficult-to-dissolve lumps in aqueous solutions. The literature describes that apatite can be decomposed and used to determine fluorine. Since then, there is no report of practical application. On this basis, we have examined in detail the conditions for the decomposition of phosphate rock using a domestic 732 cation exchange resin. Experiments have shown that in the solution obtained after the decomposition of the sample, since the cation is separated and removed, the solution can be directly fractionated to determine fluorine, chlorine and iodine by the general method. Procedures are simple, the effect is better.