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纯铜和钢合金中痕量铋的测定,一般是用Fe(OH)_3共沉淀,再经二次沉淀分离。锑对铋测定有干扰,需要溴化物挥发法除锑,因此,分析手续往往繁杂冗长。在前人工作的基础上,我们用小型717~#强碱性阴离子交换柱,从大量铜及锌、铅、钴、镍等共存元素中将铋富集,用EDTA热溶液洗脱,于PAR-NaOH-EDTA-甘露醇底液中用示
Determination of trace amounts of bismuth in pure copper and steel alloys is generally coprecipitated with Fe (OH) 3 and then separated by secondary precipitation. Antimony bismuth determination of interference, the need for volatile bromide bromide antimony, therefore, the analysis is often complicated and lengthy procedures. Based on the previous work, we concentrated the bismuth from a large amount of copper and zinc, lead, cobalt, nickel and other coexisting elements with small 717 ~ # strong basic anion exchange column, eluted with EDTA hot solution, -NaOH-EDTA-mannitol base solution shown