| 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,郭遂君. 微分电位溶出法测定尿中铅[J]. 四川大学学报(医学版), 1989, 0(3) |
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| 作者姓名： | 孙小欣 张明玉 郭遂君 |
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| 作者单位： | 华西医大卫生检测教研室(孙小欣)，华西医大附属职业病防治院(张明玉)，华西医大附属职业病防治院(郭遂君) |
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| 摘 要： | 作者研究了用微分电位溶出法测定尿中铅。尿样用盐酸酸化至0.2mol/L,直接用预镀汞膜的玻碳工作电极在-1.2V(对SCE)富集80秒,用标准加入法定量。结果:铅的线性范围在0～150ppb,检出限达2ppb,尿样中铅的回收率达89.5～110.0％,相对标准偏差为1.6％。本法灵敏、快速、准确、简便,而且成本低廉,样本不需消化处理,不使用有机溶剂等有毒物质;与双硫腙法比较,其结果无显著性差异。
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| 关 键 词： | 尿铅测定 微分电位溶出法 |
DETERMINATION OF LEAD IN URINE BY DIFFERENTIAL POTENTIOMETRIC STRIPPING ANALYSIS |
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| Sun Xiaoxin,Zhang Mingyu,Guo Suijun. DETERMINATION OF LEAD IN URINE BY DIFFERENTIAL POTENTIOMETRIC STRIPPING ANALYSIS[J]. Journal of Sichuan University. Medical science edition, 1989, 0(3) |
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| Authors: | Sun Xiaoxin Zhang Mingyu Guo Suijun |
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| Affiliation: | Sun Xiaoxin;Zhang Mingyu;Guo Suijun Department of Sanitary Occupational Disease Prevention Technology and Treatment Hospital |
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| Abstract: | In the determination of lead in urine bydifferential potentiometric stripping analysis(DPSA) urine samples are acidified withhydrochloric acid to a total concentrationequal to 0.2 mol/L without prior digestionwith mineral acids.The sample is pre-elec-trolyzed at-1.2V (Vs SCE) for 80 secondsby glassy-carbon electrode coated with mer-cury. The lead concentrations are evaluatedby means of standard addition. Detectionlimit of the method is 2ppb. The linearrelationship occurs in the range of 0-150ppb.The relative standard deviations are 1.6%and the recovery of lead in urine samplesis 89.5-110.0%. Compared with dithizonemethod, this methed shows no significantdifference in the results obtained. |
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| Keywords: | Lead determination Urine analysis Differential potentiometric stripping analysis |
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