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作者报道了在盐酸－碘化钾－钒（ＩＶ）－乙醇－抗坏血酸体系中，用络合催化极谱法测定血中微量铅的方法。在此体系中，铅的峰电位为－０．５４Ｖ（ＶＳ．ＳＣＥ），铅浓度在０～１．００μｇ／３ｍｌ范围内与峰电流有良好的线性关系。样品加标回收率为７６．０％～１０５．０％，平均回收率为９１．０％。相对标准偏差为３．６％～７．０％。最低检测浓度为４５μｇ／Ｌ。采用本法对２４例正常人和６例铅作业工人血中铅的测定，结果与临床诊断符合。该法操作简便快速、灵敏度高、结果准确可靠，适合于正常人和铅作业工人血铅的测定。
The authors report a method for the determination of trace lead in blood by complex catalysis polarography in the hydrochloric acid - potassium iodide - vanadium (IV) - ethanol - ascorbate system. In this system, the peak potential of lead is -0.54V (VS.SCE), and the lead concentration has a good linear relationship with the peak current in the range of 0 ~ 1.00μg / 3ml. The recoveries of spiked samples ranged from 76.0% to 105.0% with the average recoveries of 91.0%. The relative standard deviations were 3.6% -7.0%. The lowest detection concentration of 45μg / L. The determination of lead in blood of 24 normal subjects and 6 lead workers by this method was consistent with clinical diagnosis. The method is simple, rapid and sensitive, the results are accurate and reliable, suitable for the determination of blood lead in normal people and lead workers.