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目的建立一种简便、快速的鱼、虾等生物样品中重金属元素的分析方法。方法以10.0μg/L的Rh作为内标,采用硝酸-过氧化氢-高氯酸体系,用全自动石墨消解仪消解鱼、虾等生物样品,建立石墨消解-电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry,ICP-MS)同时测定样品中铜、镉、锌、铬4种金属元素的方法。结果各元素的检出限在0.001~0.200μg/L之间,相对标准偏差在0~2.30%之间,加标回收率为在91.4%~113.4%之间。对大虾标准品(GSB-28)进行分析的测定值与标准值吻合良好。结论本研究所建立的方法简单、快速,灵敏度高,重现性好,是同时分析大批生物样品中多种金属元素的可靠、高效方法。
Objective To establish a simple and rapid method for the analysis of heavy metal elements in biological samples such as fish and shrimp. Methods Rhodamine 10.0μg / L was used as an internal standard. The samples were digested by automatic graphite digestion apparatus with nitric acid - hydrogen peroxide - perchloric acid system to establish the inductively coupled plasma mass spectrometry (ICP - MS) coupled plasma mass spectrometry (ICP-MS) for the simultaneous determination of four metal elements copper, cadmium, zinc and chromium in samples. Results The detection limits of all the elements ranged from 0.001 to 0.200 μg / L, with relative standard deviations between 0 and 2.30%. The spiked recoveries ranged from 91.4% to 113.4%. The prawn standard (GSB-28) analysis of the measured values and the standard value in good agreement. Conclusion The method established in this study is simple, rapid, sensitive and reproducible. It is a reliable and efficient method for simultaneous analysis of various metal elements in a large number of biological samples.