APDC共沉淀分离富集-火焰原子吸收分光光度法测定明矾中的痕量铅  

Determination of Trace Lead in Alum by Flame Atomic Absorption Spectrophotometry after APDC Coprecipitation Concentration

作　　者：苏耀东[1] 冉红锋 赵维民 

机构地区：[1]同济大学化学系,上海市四平路1239号200092

出　　处：《光谱实验室》1997年第5期21-24,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文研究了APDC－CU（Ⅱ）共沉淀分离富集，开槽管原子捕集火焰原子吸收光谱测定铅的条件，发现痕量铅在pH值为2－8的条件下能被APDC－Cu（Ⅱ）定量共沉淀，方法的检出限可达1．5×10－2μg／mL。用于明矾中痕量错的分离富集和测定，共存物质不产生干扰，样品6次平行测定的相对标准偏差＜4％。加标回收率在98％－103％之间。In this paper,the conditions of determintation of Pb by STAT-FAAS after APDC-Cu(Ⅱ)coprecipitation concentration are studied. It is found that Pb (Ⅱ)can be quantitatively coprecipitated byAPDC-Cu(Ⅱ) with the pH value range of 2 to 8. The detection liimit is 1-.5×10-2μg/mL. No interference is observed from coexistent substances for the determination and concentration of Pb in alum.Te relative standard devtation of 6 repeated sample's measurements is <4 %. The recovery is 98% 103 %.

关 键 词：添加剂 预富集 铅 火焰原子吸收 分光光度 明矾 

分 类 号：TS207.51[轻工技术与工程—食品科学] O614.433[轻工技术与工程—食品科学与工程]