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目的建立血液中铅的石墨炉原子吸收测定方法。探讨影响检测结果的主要因素。方法血液样品用1%Triton X-100溶液和1%硝酸溶液稀释。加入基体改进剂1%NH4H2PO4溶液,石墨炉原子吸收测定铅含量。结果铅的浓度在0～80μg/L范围内,回归方程Y=0.005219+0.003441X,r=0.9996,最低检出浓度为1.0μg/L,加标回收率为92%～110%,相对标准偏差小于3%。实验室间比对结果满意。结论方法准确、灵敏,适合血液中铅的检测。
Objective To establish a method for the determination of lead in blood by graphite furnace atomic absorption spectrometry. To explore the main factors that affect the test results. Methods Blood samples were diluted with 1% Triton X-100 solution and 1% nitric acid solution. Add matrix modifier 1% NH4H2PO4 solution, graphite furnace atomic absorption spectrometry for the determination of lead content. Results The concentration of lead in the range of 0 ~ 80μg / L, the regression equation Y = 0.005219 + 0.003441X, r = 0.9996, the lowest detection concentration of 1.0μg / L, the recovery of 92% to 110%, the relative standard deviation Less than 3%. Satisfied with the results of the laboratory tests. Conclusion The method is accurate, sensitive and suitable for the detection of lead in blood.