摘要
目的建立食品中钾、钠、钙、镁、铁、锌、铜、锰等8种元素的电感耦合等离子体发射光谱测定方法。方法食品样品经硝酸高压消解后,电感耦合等离子体光谱法测定。结果各元素检出限为0.02-6 mg/kg（固体样品）,0.005-2 mg/L（液体样品）;各元素线性良好,相关系数R〉0.999;各元素精密度为0.1%-9.6%,回收率为88%-115%;国家标准参考物质的分析结果在证书值范围内。结论该方法简便、快速、准确,可用于食品中8种金属元素的测定,能满足食品检测的相关技术要求。
Objective To establish a method for determination of 8 elements including K,Na,Ca,Mg,Fe,Zn,Cu and Mn in food by inductively coupled plasma optical emission spectrometer（ ICP-OES）. Methods After high-pressure digestion by HNO3 in closed-vessel,8 elements were simultaneously determined by ICP-OES. Results The detection limits of 8 elements ranged from 0. 02 to 6 mg / kg（ solid samples）,0. 005 mg / L to 2 mg / L（ liquid samples）. The average correlation coefficients were≥0. 999 with good linearity. The precision ranged from 0. 1% to 9. 6%,the recoveries ranged from88% to 115%. The results of analyzing standard materials were in the certificate values.Conclusion The method is rapid and accurate with less interference which meets the technical requirements of food testing and can be applied to the determination of 8elements in food simultaneously.
出处
《卫生研究》
CAS
CSCD
北大核心
2015年第2期307-311,316,共6页
Journal of Hygiene Research
基金
食品安全国家标准制(修)订项目计划(No.SPAQ-2011-50)
关键词
元素
食品
电感耦合等离子体光谱法
element
food
inductively coupled plasma optical emission spectrometer
