蒸馏容量法测定铅基合金中的砷  

Distillation Capacity Method for Determination of Arsenic in Lead Alloy

作　　者：宫嘉辰 王艳红[1] 张颖[1] 

机构地区：[1]沈阳有色金属研究院,辽宁沈阳110141

出　　处：《有色矿冶》2014年第3期66-67,71,共3页Non-Ferrous Mining and Metallurgy

摘　　要：建立了蒸馏容量法测定铅基合金中的砷的分析方法。用稀硝酸溶样，以硫酸铅沉淀形式分离基体铅。砷在30％的盐酸溶液中是A s （Ⅲ）离子状态于108℃时以三氯化砷形式挥发，收集蒸馏出来的三氯化砷并中和至中性，以20％的碳酸氢钠溶液作缓冲液，用碘标准溶液滴定。使用本方法对铅基合金标准样品中的砷的测定，其相对标准偏差为2．50％～3．50％，结果准确可靠，方法切实可行。Set up the distillation capacity analysis method for determination of arsenic in the lead alloy . With dilute nitric acid to dissolve sample , in the form of lead sulfate precipitation separation matrix of lead . Arsenic in 30% hydrochloric acid solution is the As （ Ⅲ） ion condition at 108 ℃ in the form of arsenic trichloride volatile , collect distillation of arsenic trichloride and neutralization to neutral , with 20% sodium bicarbonate solution As a buffer , with iodine standard solution titration . Using this method for the determination of arsenic in lead based alloy standard samples , the relative standard deviation is 2 .50% ~3 .50% , the results accurate and reliable , the method is feasible .

关 键 词：蒸馏容量法 铅基合金 砷 

分 类 号：O658.3[理学—分析化学]