【摘要】 用一台自制的非色散原子荧光光度计与氢化法相结合测定痕量砷。荧光测量是建立在用硼氢化钾还原砷,并将砷的气体氢化物导入电加热石英管中原子化的基础上。砷的检出极限是0.2ppb或1ng。试剂空白在5毫升样品溶液中相当于5ng的砷。分析工作曲线的线性范围从检出极限算起约为3个数量极。该法应用于饮用水、废水和人发中痕量砷的测定,得到了满意的结果。更多还原

【Abstract】 A self-made nondispersive atomic fluorescence spectrometer is combined with a hydride generation technique for determination of arsenic. Fluorescence measurement is based on the reduction of arsenic by potassium borohydride and introduction of its gaseous hydride into the electrically heated silica tube. The detection limit is 0.2 ppb or 1 ng. The reagent blank for a 5ml sample is ca. 5ng of arsenic. Analytical working curve is linear over ca. three orders of magnitude from the detection limit. The method gives satisfactory results for the determination of trace amounts arsenic in the drinking water, waste water and human hair.更多还原