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目的改进石墨炉原子吸收法直接测定血液中铅的方法。方法 TritonX-100作为血液稀释剂,磷酸二氢铵作为基体改进剂,通过优化仪器实验条件,直接进样测定全血中铅。结果血铅浓度在0～100μg/L范围内呈良好的线性关系,相关系数r=0.9997,最低检出限为0.014μg/L,相对标准偏差小于3.14%,回收率在96.5%～103.5%之间。结论该方法简便,快速,灵敏度高,精密度好,结果准确,适用于直接测定血液中铅。
Objective To improve the direct determination of lead in blood by graphite furnace atomic absorption spectrometry. Methods TritonX-100 as a blood thinner, ammonium dihydrogen phosphate as a matrix modifier, by optimizing the experimental conditions of the instrument, direct injection determination of whole blood lead. Results The blood lead concentration showed a good linearity in the range of 0-100 μg / L with a correlation coefficient of 0.9997, a minimum detectable limit of 0.014 μg / L, a relative standard deviation of less than 3.14%, and a recovery of 96.5% -103.5% between. Conclusion The method is simple, rapid, sensitive, accurate and accurate. It is suitable for direct determination of lead in blood.