【摘要】 应用氢化物发生——原子荧光分析技术建立了食品中总无机砷、三价砷［Ａｓ（Ⅲ）］和五价砷［Ａｓ（Ⅴ）］的测定方法。用６ｍ ｏｌ／ＬＨＣｌ提取食品中无机砷，在２ｍ ｏｌ／ＬＨＣｌ条件下测定总无机砷，再利用三价砷、五价砷氢化物发生酸度条件的不同对三价砷进行选择测定。本方法标准曲线线性范围：总无机砷为０～４００μｇ／Ｌ，Ａｓ（Ⅲ）为０～３００μｇ／Ｌ；检出限：总无机砷１．６μｇ／Ｌ，Ａｓ（Ⅲ）１．１μｇ／Ｌ；相对标准偏差：总无机砷为１．９３％ ，Ａｓ（Ⅲ）为２．４９％ ；样品回收率：总无机砷为８５％ ～１０５％ ，Ａｓ（Ⅲ）为８０％ ～１１５％ ；一般食品样品的测定无干扰。更多还原

【Abstract】 A hydrid generation atomic fluorescence spectrometry method (HG AFS) was devoloped for determining total inorganic arsenic,As(Ⅲ) and As(Ⅴ).The inorganic arsenic in food extracted by 6mol/L HCl and total inorganic arsenic could be determined in 2mol/L HCl.As(Ⅲ) was determined selectively in mixtures of As(Ⅲ) with As(Ⅴ) by the different acidities of As(Ⅲ) and As(Ⅴ) at hydrid generation.The linear correlation ranges of total inorganic arsenic and As(Ⅲ) are 0～400 μg/ml and 0～300 μg/ml respectively.The RSD of inorganic arsenic is 1 93%and As(Ⅲ) is 2 49%.The detection limits are 1 6 and 1 1 μg/ml for inorganic arsenic and As(Ⅲ) respectively.There is no interference in the determination of general food samples.更多还原