微波等离子体原子发射光谱法(MP-AES)测定果汁中的常量元素

Determination of Major Elements in Fruit Juice by MP-AES

介绍了使用配有Agilent 4107氮气发生器的Agilent 4200微波等离子体原子发射光谱法（MPAES）分析果汁样品中的钙、镁、钠和钾等常量元素的分析方法,在分析两种质量控制（QC）测试材料时,加标回收率在90%-110%,6h中所有四种元素的相对标准偏差（RSD）均小于4%。与火焰原子吸收光谱法（FAAS）相比,MP-AES的等离子体源在检出限和线性动态范围等性能方面有所改善,MP-AES无需使用可燃性气体,也无需使用昂贵又费时的改性剂和电离抑制剂,对标准物质的测定结果与标准值基本一致。4200 MP-AES将是替代火焰原子吸收仪器的理想选择。

Major elements,such as calcium,magnesium,sodium and potassium in fruit juice samples were determined by using an Agilent 4200 MP-AES with an Agilent 4107 nitrogen generator.The propose method was validated by two QC test materials with the recoveries in the range of 90% -110%.The relative standard deviations（RSD）of the four metal elements were less than 4%.MP-AES has been described to be superior to FAAS owing to the improvement of detect limit and linear dynamic range.In addition,Flammable gas or costly and time consuming modifiers and ionization suppressants were no need in MP-AES methods.A good agreement between found and certified values in the certified reference materials was obtained.It makes 4 200 MP-AES an ideal alternative for FAAS users.