【摘要】 本工作研究了同位素稀释—火花源质谱法应用于生物样品中微量元素测定的若干问题,包括样品制备、谱线测量与最佳稀释条件选择等。本方法经分析NBS—SRM 1577a 牛肝、日本胡椒叶和国内大米粉标准参考物验证,为商业部食品检测科学研究所研制的猪肝标样中 Cu,Zn,Mo,Pb,Fe 和甘兰标样中 Cu,Zn,Pb,Rb,Sr 微量元素提供了定值分析数据,后又为北京市环境监测中心研制的镉大米标样中 Cu,Zn,Pb,Fe 元素提供了定值分析数据,测定值与其它分析方法分析值相符。更多还原

【Abstract】 An Isotope Dilution Spark Source Mass Spectrometric Method (ID-SSMS) has been developed tor certification of the trace elements in home biological standard reference materials.The preparation of sample,spectral interferences and selection of interference-free lines,and selection of optimum spike addi- tion have been studied.ID-SSMS has been applied to certification of the trace elements in pig liver,kale and rice flour standard reference materials.The accuracy is demonstrated by analyzing NBS-SRM 1577a bovine liver and pepper leaves standard reference materials.更多还原