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钛及其合金中微量铈的测定,资料采用PMBP萃取—偶氮肿Ⅲ分光光度法,此法灵敏度较低,操作繁琐,且使用大量有机溶剂,对人体健康有害。文献报导了新试剂偶氮氯膦—pN测定稀土具有灵敏度高,选择性好等优点。本文在此基础上将该试剂应用于钛合金中微量铈的测定。试验了铈与偶氮氯膦—PN(CPA—pN)形成稳定络合物的条件。并用过氧化氢络合钛、矾、钼等主量元素,以铝和镁盐作共沉淀剂,用氨水沉淀分离出铈,再用偶氮氯膦—PN比色测定钛合金中微量铈的方法,
Determination of trace cerium in titanium and its alloys, the data using PMBP extraction - azo-swollen Ⅲ spectrophotometry, this method is less sensitive, cumbersome operation, and the use of large amounts of organic solvents, harmful to human health. Literature reported a new reagent chlorophosphonazo-pN determination of rare earth with high sensitivity, good selectivity and so on. Based on this, the reagent was applied to the determination of trace cerium in titanium alloy. The conditions for the formation of a stable complex of cerium with chlorophosphonazo-PN (CPA-pN) were tested. And the main elements such as titanium, alum and molybdenum are complexed with hydrogen peroxide, aluminum and magnesium salts are used as coprecipitators, cerium is precipitated by ammonia water, and the trace cerium in titanium alloy is measured by chlorophosphonazo-PN colorimetry method,