| 微分电位溶出法测定尿中铅 |
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| 引用本文： | 孙小欣 张明玉. 微分电位溶出法测定尿中铅[J]. 华西医科大学学报, 1989, 20(3): 324-326 |
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| 作者姓名： | 孙小欣 张明玉 |
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| 摘 要： |
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| 关 键 词： | 电位溶出法 尿铅测定 铅中毒 |
Determination of lead in urine by differential potentiometric stripping analysis |
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| X X Sun,M Y Zhang,S J Guo. Determination of lead in urine by differential potentiometric stripping analysis[J]. Journal of West China University of Medical Sciences, 1989, 20(3): 324-326 |
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| Authors: | X X Sun M Y Zhang S J Guo |
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| Abstract: | In the determination of lead in urine by differential potentiometric stripping analysis (DPSA) urine samples are acidified with hydrochloric acid to a total concentration equal to 0.2 mol/L without prior digestion with mineral acids. The sample is pre-electrolyzed at -1.2V (Vs SCE) for 80 seconds by glassy-carbon electrode coated with mercury. The lead concentrations are evaluated by means of standard addition. Detection limit of the method is 2ppb. The linear relationship occurs in the range of 0-150ppb. The relative standard deviations are 1.6% and the recovery of lead in urine samples is 89.5-110.0%. Compared with dithizone method, this method shows no significant difference in the results obtained. |
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