原子荧光光谱法同时测定食品中砷和硒.pdf

- PT CA ( PA RT B: CH EM . A NA L . ) 2005 4 1 7 工作简报 ( , 570206) : 应用A FS820 双道原子荧光光谱仪, 硝酸硫酸消解样品, 在硫酸盐酸混合酸介质中, 经盐酸预还原 , 以硼氢化钾还原形成 烷和砷化氢, 同时测定食品中砷和 砷和 的检出限分 别为0. 42 和0. 58 g L- 1 通过对食品标样分析表明, 测定结果与标准值相符, 相对标准偏差( n = 5) 砷小于5. 8% , 小于7. 2% : 原子荧光光谱法; 砷; ; 食品 : : A : 100 14020( 2005) S M ULT ANEOU S A FS DET ERM N AT ON OF ARSEN C AND SELEN U M N FOODST U F FS ZENG Yuchong ( H a inan Centr al L abor ator y of M GMR , H a ikou 570206, China) Abstract: A sensitive simple metho d fo r the determination of As and Se in foodstuffs w as pr oposed. T he detectio n limit s of As and Se w ere found to be 0. 42 and 0 . 58 g L - 1 respect ively. T he metho d has been applied to the determination of As and Se in CRM s. T he results ar e in agr eement with certified values wit h RSD ( A s) 5. 8% ( n = 5) and RSD ( Se) 7. 2% ( n= 5) . Keywords: AF S; Selenium; A r senic; F oo dstuffs; 1. 320 0 g, 3. 6 mo l L- 1 25 mL [ 1] - 1 , , 3. 6 mo l L 1 L , , : 1. 000 g L- 1 , 1. 000 0 g 100 m L , 10 m L, 1 , 1 L , , 1. 1 A FS820 1. 0 mg L- 1 : 500 mL 1 L 1. 2 , 1 g , , 1 1, , 1. 3 : 15 g L- 1 , ( A R) 1. 3. 1 样品预处理 15. 0 g, 0. 1 mol L- 1 1 L , 1. 0~ 2. 5 g 100 mL ,