采用同一种前处理方法即硝酸和高氯酸消解处理烟草样品后,氢化物发生-原子荧光光谱法测定烟叶中砷、铅;原子吸收光谱法测定烟叶中镉。样品溶液介质为10%的盐酸,对7个样品平行3次重复实验,其相对标准偏差为砷:0.81%—4.96%、铅:2.82%—5.83%、镉:0.96%—4.60%,砷、铅、镉的检测线性范围分别为:0.0—120.0、0.0—60.Oμg·L~(-1)和0.0—800.0μg·L~(-1),加标回收率:砷在94.5%—96.9%之间、铅在92.7%—101.6%之间、镉在102.2%—110.9%之间。 Determination of arsenic and lead in tobacco leaves by hydride generation - atomic fluorescence spectrometry after treating same with nitric acid and perchloric acid by the same pretreatment method. Determination of cadmium in tobacco leaves by atomic absorption spectrometry. The relative standard deviation of arsenic: 0.81% -4.96%, lead: 2.82% -5.83%, cadmium: 0.96% -4.60%, arsenic, The linear ranges of Pb and Cd were 0.0-120.0,0.0-60.Oμg · L -1 and 0.0-800.0μg · L -1, respectively. The recoveries were in the range of 94.5% -96.9 %, Lead between 92.7% and 101.6%, and cadmium between 102.2% and 110.9%.