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本文详细地研究了用 KBiI_4作沉淀剂,测定铯盐产品中的铯。在氯化铷存在下,则采用重沉淀,在第二次沉淀前,采用阴离子交换分离的方法除去 Bi_2I_9,代替了通 H_2S除铋的方法。本法测定误差在0.7%以内,相对标准误差为±0.3%。重量法测定铯所用试剂甚多,其主要困难是铷干扰铯的测定。各种沉淀铯的试剂中,碘铋酸钠是一种较好的铯的沉淀剂。碘铋酸盐用于铯的重量法,最早见于
In this paper, KBiI_4 as a precipitant was studied in detail to determine the cesium in the cesium salt product. In the presence of rubidium chloride, heavy precipitation was used. Before the second precipitation, Bi_2I_9 was removed by anion-exchange separation instead of H_2S-removing bismuth. The determination of the error within 0.7%, the relative standard deviation of ± 0.3%. Gravimetric determination of cesium used many reagents, the main difficulty is the determination of rubidium interference cesium. Among the various precipitated cesium reagents, sodium iodo-bismuthate is a good cesium precipitating agent. Iodine bismuth for gravimetric method of cesium, the earliest seen