摘要
目的:优化石墨炉原子吸收光谱法测定尿中铅的各种检测条件。方法:石墨炉原子吸收光谱标准加入法。结果:对三种基体改进剂的优化选择及其加入量的选择,控制空白的低吸光度,检出限为1.13μg/L,选定石墨炉升温条件,优化石墨炉灰化及原子化温度,曲线相关系数为0.9991,加标回收率达95.4%～102.3%,RSD 3.27%。结论:本方法检出限低,灵敏度高,简便、快速、可靠地进行大批量尿铅的检测。
Objective： To optimize the factors in determination of lead in urine by GFAA.Methods：The standard addition method with Graphite furnace atomic absorption spectrometry were used in this determination.Results： An optimal one was selected from the three matrix-modifiers with appropriate dosage and control the low absorbance of the blank tube.The detection limit was 1.13 μg/L.The graphite furnace heating condition was selected to optimize the ashing and atomization temperature.The curve coefficient was 0.9991.The recovery was 95.4%~102.3%,RSD was 3.27%.Conclusion：This method can get the low detection limit,which is sensitive,simple,rapid and reliable for detecting large amount of lead in urine.
出处
《中国卫生检验杂志》
CAS
2011年第9期2192-2193,2196,共3页
Chinese Journal of Health Laboratory Technology
关键词
石墨炉原子吸收光谱法
尿铅
优化
检测条件
Graphite furnace atomic absorption spectrometry
Urinary lead
Optimize
Determination conditions
