儿童尿液经硝酸-过氧化氢消解， 抗坏血酸-硫脲预还原后， 用流动注射氢化物发生法使尿样中的砷转化为砷化氢， 原子荧光光谱法测定尿液中总砷代谢水平。 分析使用当天建立的校准曲线， 并扣除空白， 方法检出限0.03 μg·L-1。 对上海闵行地区40例儿童尿样检测的结果表明， 儿童尿砷在0.5～1.5 μg·L-1范围内， 可能与食用海产品有关， 对人体健康没有影响。

Children’s urine sample was digested with nitric acid and drop-wise added hydrogen peroxide. After pre-reduction with ascorbic acid-thiourea, the total arsenic in sample solution was formed arsine in a flow injection hydride generation system and then was detected by atomic fluorescence spectrometry. Calibration curve was established every day and blank correction should be made for each analysis. Detection limit was 0.03 μg·L-1. Analytical results of urine arsenic for 40 children sampling from Minhang District, Shanghai, were in the range of 0.5～1.5 μg·L-1, possibly due to the foodstuffs of seafood and is not harmful to the human health.