无火焰原子吸收测定环境样品中的痕量铅  

Determination of Trace lead in environment by non-flame atomic absorption spectrometry

作　　者：万鹰昕[1] 李楠[1] 吴丽萍[1] 张景义[1] 

机构地区：[1]北京联合大学应用文理学院,北京100191

出　　处：《应用化工》2016年第3期565-567,共3页Applied Chemical Industry

基　　金：北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD201404085);北京联合大学"启明星"大学生科技创新项目

摘　　要：以琼脂为悬浮体进样,以磷酸二氢铵为基体改进剂,研究了悬浮液的稳定性和基体改进效应对于石墨炉原子吸收法测定环境中痕量铅的影响。结果表明,悬浮液浓度为0.15%,改进剂浓度为1.0%,灰化和原子化温度分别为800℃和2 200℃时能精确测定环境样品中的铅含量。在此条件下,用标准加入法测定土壤和藕粉中的铅含量分别为25.47μg/g和0.6μg/g。Trace lead in the environment was determined by atomic absorption spectrometry using agar as suspending agent and（ NH4）2HPO4as matrix modifier. The stability of suspending agent and effect of matrix modifier were investigated. The research shows that 0. 15% agar and the 1. 0%（ NH4）2HPO4as a modifier,800 ℃ cineration temperature and 2 200 ℃ atomization temperature are in practical use. The analytical results of the standard reference samples are consistent with the certified values. The lead content of the soil and lotus root starch are 25. 47 μg / g and 0. 6 μg / g separately using standard curve methods.

关 键 词：石墨炉原子吸收 悬浮进样 基体改进 环境样品 

分 类 号：TQ016.1[化学工程]