【作者】 王俊； 陈欣； 史奕；

【Author】 WANG Jun 1,2 ,CHEN Xin 1 ,SHI Yi 1 (1. Key Laboratory of Terrestrial Ecological Process,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China; 2. Graduate University of Chinese Academy of Sciences,Beijing 100039,China)

【机构】 中国科学院沈阳应用生态研究所陆地生态过程重点实验室； 中国科学院研究生院；

【摘要】 应用双道无色散原子荧光光谱仪,采用HNO3-HClO4体系消解土壤样品。研究了光电管负高压、灯电流、载气和屏蔽气流量、硼氢化钾和铁氰化钾浓度对测定结果的影响。在选定实验条件下,铅的线性范围为0～100μg·L-1,检出限为0.04μg·L-1,相对标准偏差为1.25%,加标回收率为93.8%～105.6%。此方法简便、快捷,测定结果准确可靠。更多还原

【Abstract】 A double-channel and dispersionless atomic fluorescence spectroscopy has been developed for determination of trace lead in soils after digestion using HNO 3 -HClO 4 system. The effect of the experimental conditions and instrumental operating parameters (e.g. negative voltage,current of lampKBH 4 concentration and K 3 Fe(CN) 6 concentration,et al. ) on the determination of Pb is investigated. Under the optimum conditions,the linear range of determination is 0～100μg·L -1 ,and the detection limit is 0.04μg·L -1. The instrumental relative standard deviation is 1.25% and the recovery is about 93.8%～105.6%. This method is simple and rapid. The testing results are accurate and reliable.更多还原