小龙虾中汞的微波消解-原子荧光谱测定法

目的通过微波消解-原子荧光法探寻一种检测小龙虾中汞的简便、准确可行的方法。方法采用最佳微波消解程序分步消解样品,选择仪器最佳检测条件以及最佳载流浓度和还原剂浓度,通过加标回收试验和精密度试验,确定其准确度和精密度。结果该方法检出限为0.001 5 mg/kg,回收率为90%～101%。结论该方法具有简单、准确、重现性好等优点,可以满足水产品总汞的检测需要,并且可以应用于汞形态分析的筛检试验。

Determination of mercury in crayfish by microwave digestion-atomic fluorescence spectrometry

[Objective]To establish a method for simple,accurate and feasible determination of mercury in crayfish by microwave digestion-atomic fluorescence spectrometry.[Methods]The optimum procedure of microwave digestion stepwise digestion was used.And the optimum detection condition and optimal load flow concentration and the concentration of the reducing agent were chosen to determine its accuracy and precision,through the standard recovery test and precision experiment.[Results]The detection limit was 0.001 5 mg/kg,the recoveries were 90%-101%.[Conclusion]The method is simple,accurate,reproducible,can meet the demand of total mercury detection in aquatic product,and can be applied to the speciation analysis of mercury screening experiment.