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微量CN-和S~(2-)的测定,通常需要预分离以消除卤离子、SCN~-、S_2O_3~(2-)等以及CN~-和S~(2-)之间的相互干扰。因而,操作步骤冗长和费时间。离子色谱的出现给阴离子的分析带来突破,也使得CN~-和S~(2-)的快速分离和测定成为可能。迄今,已发表的离子色谱法测定CN~-和S~(2-)的文章不多。先后为DuVal,Dolzine,Pinschmidt和Koch报导的方法灵敏度都不高,为ppm数量级,而且仅测定CN~-。Bond和Rocklin提出了同时测定
The determination of trace amounts of CN- and S ~ (2-) usually requires pre-separation to eliminate the mutual interference between halide ions, SCN ~ -, S_2O_3 ~ (2-) and CN ~ - and S ~ (2-). Therefore, the operation steps are lengthy and time-consuming. The appearance of ion chromatography has brought a breakthrough in anion analysis, and also made it possible to quickly separate and determine CN ~ - and S ~ (2-). To date, there have been few published articles on the determination of CN ~ - and S ~ (2-) by ion chromatography. Methods reported sequentially by DuVal, Dolzine, Pinschmidt, and Koch were all less sensitive, on the ppm scale, and only CN ~ -. Bond and Rocklin proposed a simultaneous assay