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目的:建立海产品中痕量汞的微波消解-氢化物发生-原子荧光光谱测定方法。方法:采用微波消解法对样品进行前处理,以硼氢化钾为还原剂,5%盐酸为载流,氩气为载气,利用原子荧光法对样品中的痕量汞进行测定。结果:汞在0.1μg/L～10.0μg/L范围具有良好的线性,相关系数大于0.9990,RSD在1.7%～8.8%之间。采用本法对紫菜成分分析标准物质(GBW10023)和黄鱼成分分析标准物质(GBW08573)进行了方法验证,所测结果均在标准参考值允许范围之内。结论:本法具有简便、灵敏、准确的优点,适合海产品中痕量汞的测定。
Objective: To establish a method for the determination of trace mercury in seafood by microwave digestion - hydride generation - atomic fluorescence spectrometry. Methods: The sample was pretreated by microwave digestion method. The trace mercury in the sample was determined by atomic fluorescence spectrometry with potassium borohydride as reducing agent, 5% hydrochloric acid as carrier and argon as carrier gas. Results: Mercury had a good linearity in the range of 0.1μg / L ~ 10.0μg / L with the correlation coefficient greater than 0.9990 and RSD between 1.7% and 8.8%. The method was used to validate the standard composition of seaweed composition (GBW10023) and the standard composition of yellow croaker (GBW08573). The measured results are within the allowable range of the standard reference. Conclusion: This method has the advantages of simple, sensitive and accurate, suitable for the determination of trace mercury in seafood.