电感耦合等离子体质谱法测定东海乌参中多种金属元素含量

Determination of elements contents in Acaudina leucoprocta by inductive coupled plasma mass spectrometry (ICP-MS)

目的建立微波消解处理样品,动态反应池一电感耦合等离子体质谱法测定东海乌参中Cr、Cu、Zn、As、Cd、Pb、Ni七种元素的分析方法。方法采用以H2作为动态反应池反应气,消除了ArCl、CaO、MgAr、CaCl、ArO和MgAr的质谱干扰,并确定最佳H2流量为75 mL/min,采用In、Y、Sc为内标元素补偿了仪器信号漂移和基体效应。结果方法检出限介于0.027～0.32 ng/mL,加标回收率在83.5%～105.3%之间,相对标准偏差为2.5%～8.2%。结论本文所建立的方法适用于海参等海产品中多种金属元素的检测分析。

Objective To establish a method for determination of the seven mineral elements in Acaudina leucoprocta including Cr,Pb,As,Cd,Zn,Cu and Ni by inductively coupled plasma mass spectrometry(ICP-MS) with microwave digestion sample treatment.Methods The spectral interference of ArCl、CaO、 MgAr,CaCl,ArO and MgArl was eliminated with H2 as reaction gas of dynamic reation cell.The optimal H2 flow rate was established as 75 mL/min.The instrumental signal shift and matrix effect were compensated with Y,Sc,and In as internal standard element.Results The results showed that the 1imits of detection were in the range of 0.027~0.32 ng/mL,and the recovery rates were at 83.5%～105.3%.The relative standard deviation was 2.5%～8.2%.Conclusion The established methods can be used to determine the seven mineral elements content in Acaudina leucoprocta.