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目的:建立一种简便、快速、准确可靠的石墨炉原子吸收光谱法测定全血中铅的方法。方法:全血样经0.02%Pd Cl2+0.5%Triton X-100+0.1%HNO3混合基体改进剂稀释后直接进样,塞曼背景校正,峰面积定量,石墨炉原子吸收标准加入校正法进行测定。结果:血铅含量在0~200μg/L范围内线性关系良好,相关系数r=0.9996,方法的检出限为0.38μg/L,加标回收率为97.9%~104.2%,RSD为4.3%~5.5%,应用方法测定GBW(E)090033-090036全血铅、镉成分分析标准物质结果与标准值相吻合。结论:房法准确度、精密度良好,样品不需消化,污染小,是一种快速批量测定全血中铅较为理想的方法。
Objective: To establish a simple, rapid, accurate and reliable method for the determination of lead in whole blood by graphite furnace atomic absorption spectrometry. Methods: Whole blood samples were directly diluted by 0.02% Pd Cl2 + 0.5% Triton X-100 + 0.1% HNO3 mixed matrix modifier, corrected by Zeeman background, peak area quantification, and graphite furnace atomic absorption spectrophotometry. Results: The calibration curve was 0.38μg / L with the correlation coefficient of 0.9996. The recoveries were 97.9% -104.2% with RSDs of 4.3% ~ 5.5%, application methods Determination of GBW (E) 090033-090036 whole blood lead and cadmium analysis of standard substances results consistent with the standard value. Conclusion: The accuracy and precision of the method are satisfactory. The samples are not digested and have little pollution. Therefore, it is an ideal method for rapid and batch determination of lead in whole blood.