全血中铅的石墨炉原子吸收光谱测定法

Determination of Lead by Graphite Furnace Atomic Absorption Spectrometry in Whole Blood

目的探讨用石墨炉原子吸收光谱法测定全血中铅的方法。方法用混合基体改进剂[5.0g/LNH4H2PO4+1.0g/LTritonx-100+2.0ml/LHNO3]稀释样品,采用Zeeman石墨炉原子吸收光谱仪,全自动进样方法进行测定。结果方法的线性范围为0～40μg/L,相关系数为0.9982,RSD为5.5%～12.2%,回收率为90%～106%,方法的检出限为1.1μg/L。结论此方法具有结果准确可靠、方法简便快速、样品不需消化、污染小等优点,可适用于血铅的测定。

Objective To develop a method to determine lead in the whole blood with graphite furnace atomic absorption spectrometry.Methods The whole blood was diluted with mixing matix modifiers [5.0 g/L NH4H2PO4+1.0 g/L Tritonx-100+2.0 ml/L HNO3],then the samples were automatically injected and the blood lead level was determined with Zeeman graphite furnace atomic absorption spectrometer.Results There was significant linear relation between absorbance and lead level in the range of 0-40 μg/L(r=0.998 2),the relative ...