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| 微波消解-原子吸收光谱法测定玉米油中的矿物质含量 |
| Determination of mineral elements in corn oil by microwave digestion-atomic absorption spectrometry |
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| DOI： |
| 中文关键词: 玉米油 矿物质 微波消解 原子吸收光谱法 |
| 英文关键词:corn oil mineral element microwave digestion atomic absorption spectrometry |
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| 中文摘要: |
| 采用HNO3-50% H2O2微波消解体系，空气-乙炔火焰原子吸收光谱法，分析不同来源、不同品牌玉米油中Ca、K、Mg、Fe、Na、Zn 6种矿物质元素含量。结果表明：该方法能准确测定玉米油中矿物质元素含量，线性方程相关系数均在0.995以上，相对标准偏差在1.8%～4.3%，方法精密度高，回收率为89.30%～115.80%，回收结果满意，且方法简单。同时发现大型超市购买的玉米油中矿物质含量稳定，且含量顺序均为Ca> K>Mg>Fe>Na>Zn，农贸市场购买的玉米油矿物质含量差异较大，存在个别元素过高或过低现象。 |
| 英文摘要: |
| The contents of six kinds of mineral elements （Ca、K、Mg、Fe、Na、Zn）in corn oils of different brands and different places were analyzed by air-ethyne flame atomic absorption spectrometry after microwave digestion by HNO3-50% H2O2. The results showed that microwave digestion-atomic absorption spectrometry was a simple method that provided accurate measurement of mineral elements in corn oil with good linear range,good precision and high recovery rate, and the correlation coefficients were above 0.995, relative standard deviation were 1.8%-4.3%, and recovery rate were 89.30%-115.80%. The contents of mineral elements in corn oils from supermarket were stable and the order of contents of mineral elements was Ca, K, Mg, Fe, Na, Zn, while the contents of mineral elements in corn oils from farmers market were very different with some contents higher and some contents lower. |
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