本文采用新银盐光度法,通过对样品的全消解、改变氢化物发生的介质和酸度等方法,成功地对同一样品中砷总量、砷的价态和砷的形态进行了分析。三价砷和无机砷总量的检出限分别为0.1和0.2ppb(3S),相关系数r_1=0.9995、r_2=0.9998。样品中砷总量(无机砷和有机砷)和无机砷总量(As(Ⅲ)和As(Ⅴ))的回收率分别为95～105%和100%,适用于饮料中超痕量砷的全分析。 In this paper, the new silver salt photometric method was used to analyze the total amount of arsenic, the valence state of arsenic and the arsenic species in the same sample by total digestion of the sample, changing the medium and acidity of the hydride. The detection limits of total trivalent arsenic and inorganic arsenic were 0.1 and 0.2ppb (3S), respectively. The correlation coefficients r_1 = 0.9995 and r_2 = 0.9998. The recovery of As (Ⅲ) and As (Ⅴ) in total arsenic (inorganic arsenic and organic arsenic) and inorganic arsenic (arsenic) was 95 ~ 105% and 100%, respectively. analysis.