Directly and rapidly analysising lead in whole blood by graphite furnace atomic absorption spectrometry

Objective:To establish the method of analysising the lead in the whole blood by graphite furnace atomic absorption spectrometry(AAS) directly and rapidly.Methods:The atomic absorption spectrometer was optimized,Nitric acid and TritonX-100 dealed with the sample dilution,Ammonium dihydrogen phosphate(ADP) acted as the basal body improver,then transversal heated the Zee-man and deduct the background,the sample was automatic sampling and the lead was detected by AAS.Results:Analying the contents of lead in standard ox blood GBW(E) 090033,090035 coincided with the certified value.Sample introduction 1ul,the lowest detected mass concentration was 2.13 μg/L,the linear range was 0.00~50.0 μg/L.the relative standard deviation(RSD) was 0.043%~0.67%,the sample was dected continuously in six days and the relative standard deviation was 1.23%~6.54%,the recovery rate of adding standard ox blood was 98.6%~104.6%.Conclusion:This methed has higher sensitivity,better reproducibility and the result is exact.The interference of basal body is fewer and the operation is convenient.