【摘要】 目的:建立海产品中痕量硒和汞的原子荧光同时快速分析方法。方法:采用微波消解处理后,用氢化物发生-原子荧光光谱法同时测定。结果:对消解液组成及仪器工作条件(负高压、载气流量、屏蔽气流量)进行优化后,在优化的工作条件下,硒、汞的检出限分别为0.039μg/kg和0.010μg/kg,线性范围分别为0.5μg/L~10.0μg/L和0.05μg/L~1.0μg/L,经加标回收试验和国家一级标准物质验证,测定结果与标准值吻合,回收率范围为90.8%~104.8%,相对标准偏差均<5%。结论:该方法简便灵敏、准确度高,适用于海产品中痕量硒和汞的同时检测。更多还原

【Abstract】 Objective:To establish a quick method for the simultaneous determination of trace selenium(Se) and mercury(Hg) in seafood.Methods: Trace Se and Hg in seafood were determined by hydride generation-atomic fluorescence spectrometry after microwave digestion.Results: The composition of digestion solution and operational conditions of AFS including negative high-voltage,flow rate of carrier gas and flow rate of shield gas were optimized.Under the optimal conditions,the limits of detection were 0.039 μg/kg and 0.010 μg/kg for Se and Hg,respectively.The linear ranges were between 0.5 μg/L~10.0 μg/L for Se,and 0.05 μg/L~1.0 μg/L for Hg,respectively.The method has been applied to the determination of trace Se and Hg in national standard reference materials and the results were in agreement with certified values.The recoveries were between 90.8%~104.8%,and the relative standard deviations were less than 5%.Conclusion: The method is simple,sensitive,accurate and suitable for the simultaneous determination of trace Se and Hg in seafood.更多还原