12份野生油茶籽油无机元素的分析测定

Determination and analysis of inorganic elements in 12 Camellia oleifera seed oil

目的：建立茶油无机元素的测定方法,为制订茶油有害金属元素限量标准提供参考,同时为其健康食用和规范化栽培基地的选择提供依据。方法：用火焰原子吸收光谱法（FAAS）测定Ca、Fe、Mg、Cu、Zn和K的含量,用石墨炉原子吸收光谱法（GFAAS）测定Pb、Cd和Cr的含量。结果：12份样品中K、Ca、Mg和Fe的含量较高,有害金属元素Pb、Cd和Cr在川雅12、川雅20、川雅21中均未检测出,在其余样品中含量也较低。FAAS法测定Ca、Fe、Mg、Cu、Zn和K的回收率为99.84%-102.55%,RSD为0.55%-2.05%;GFAAS法测定Pb、Cd和Cr的回收率为99.75%-101.85%,RSD为1.87%-3.45%;各元素的相关系数为0.9990-0.9999。结论：该方法操作简便,准确性高,结果可靠,可作为茶油无机元素的定量检测方法。

Objective：To establish the determination method of inorganic elements in Camellia oleifera seed oil,and provide a reference for quality assessment,healthy eating and the standardized cultivation base choices.Methods：Ca,Fe,Mg,Cu,Zn and K were determined by flame atomic absorption spectrometry（FAAS） and Pb,Cd and Cr were determined by graphite furnace atomic absorption spectrometry（GFAAS）. Results：The contents of K,Ca,Mg and Fe in Camellia oleifera seed oil were higher than that of other elements. The contents of Pb,Cd and Cr in Chuanya 12,Chuanya 20,Chuanya 21 were not detected. When the FAAS was used,the recovery was 99.84% －102.55% with RSD of 0.55% －2.05%. When the GFAAS was used,the recovery was 99.75% －101.85% with RSD of 1.87% －3.45%. Correlation coefficient of each element was 0.9990 －0.9999. Conclusion：The method was simple,rapid,accurate and applicable for the content determination of inorganic elements in Camellia oleifera seed oil.