Direct Determination of Lead in Urine by Graphite Furnace Atomic Absorption Spectrometry

[Objective]To improve determination of lead in urine by graphite furnace atomic absorption spectrometry.[Methods]Urine baseplates modifier,the experimental conditions by optimizing the device directly into the urine samples of lead.[Results]Urinary lead concentration in the 0-120 μg/L within the linear relationship,the correlation coefficient r=0.999 6,the lowest detection limit of 0.016 μg/L,relative standard deviation of less than 3.08%,recoveries of 97.6% and 103.2%.[Conclusion]The method is simple,rapid,high sensitive,precise,accurate and suitable for direct determination of lead in urine.