ICP-OES/ICP-MS测定葵花子中28种无机元素

Study on the Determination of 28 Inorganic Elements in Sunflower Seeds by ICP-OES/ICP-MS

建立了葵花子中微量元素组成的分析方法。采用HNO3+H2O2混合酸为消解体系经微波消解葵花子样品,电感耦合等离子体发射光谱(ICP-OES)法测定葵花子中Al,B,Ca,Fe,K,Mg,Na,Si,P和S,电感耦合等离子体质谱(ICP-MS)法测定葵花子As,Ba,Cd,Co,Cr,Cu,Li,Mn,Mo,Ni,Pb,Rb,Sr,Sn,Sb,Ti,V和Zn。采用国家一级标准物质大米(GBW10045)验证了方法的准确性,结果表明,标准物质的测定结果与参考值基本一致,葵花子中Ca,K,Mg,P,S的含量较高。该方法具有良好的准确性和精密度。

The present paper describes a simple method for the determination of trace elements in sunflower seeds by using inductively coupled plasma optical emission spectrometry（ICP-OES） and inductively coupled plasma spectrometry（ICP-MS）.HNO3＋H2O2 were used to achieve the complete decomposition of the organic matrix in a closed-vessel microwave oven.The contents of 10 trace elements（Al,B,Ca,Fe,K,Mg,Na,Si,P and S） in sunflower seeds were determined by ICP-OES while 18 trace elements（As,Ba,Cd,Co,Cr,Cu,Li,Mn,Mo,Ni,Pb,Rb,Sr,Sn,Sb,Ti,V and Zn） were determined by ICP-MS.The rice reference material（GBW10045） was used as standard reference materials.The results showed a good agreement between measured and certified values for all analytes.The concentrations of necessary micro elements Ca,K,Mg,P and S were higher.This method was simple,sensitive and precise and can perform simultaneous multi-elements determination of sunflower seeds.