火焰原子吸收光谱法测定铝及铝合金中痕量铅的_省略_化锰共沉淀分离富集技术在铝工业.pdfVIP

66 2008 4 水合二氧化锰共沉淀分离富集技术在铝工业分析中的应用 1 2 3 3 韩春玉, 郭 阳, 张颖 , 玉春 ( 1. 辽宁石油化工大学, 辽宁抚顺 113001; 2 . 内蒙古银河铝业股份公司, 内蒙古通辽028000; 3. 抚顺铝业有限公司, 辽宁抚顺 113001) : 在火焰原子吸收 谱法测定铝及铝合金中痕量铅的分析中, 本文首次采用在强碱性介质下的水合二氧化锰共 沉淀法, 实现了对铝及铝合金中痕量铅与铝基体的分离富集, 沉淀用硝酸与双氧水混合液溶解后, 在原子吸收 谱仪 上进行测定本方法操作简单, 快速, 无有机试剂, 干扰少, 铅的加标回收率在98. 6% ~ 10 1. 2% 之间, 相对标准偏差 小于2. 40% , 测量下限达 1. 0g/ g, 准确度和精密度都取得了极佳的效果 : 火焰原子吸收 谱法; 铝及铝合金; 痕量铅; 水合二氧化锰; 共沉淀; 分离富集 : T H744. 12 : B : 2008) 03663 The new method of the determination of trace lead in aluminum or aluminum alloys by FAAS T he applica ion of he separ a ion and concen ra ion me hodologies by hydr a ion manganese diox ide coprecipi a ion in Alum inum indus rial analysis 1 2 3 3 HA N Chun- yu , GU O Y ang , ZHA N G Y ing , W U Yu- chun ( 1. Liaoning Shihua University , Fushun 113001, China ; 2. I nner Mongolia Yinhe A luminum I ndustrial Comp any , Tongliao 028000, China; 3. Fushun A luminum industr ial orp or ation , Fushun 113001, China) Abstract:A me hod w as proposed f or he de ermina ion of race lead in A lum inum or Aluminum alloy s by FAA S, he me hod of coprecipi a ion by hy dra ion manganese diox ide was adop ed in he alkali medium f or he firs ime, he race lead w as separa ed from he Aluminum base af er he deposi w as dissol ved in n i ric acid and hy drogen perox ide; hen i w as de ermined a a omic spec rograph . T he advan age of his me hod is sim ple , wi h no or ganic reagen , less in erf erence , he lead recovery of s andard addi ion is 98. 6 o