| 刘宏伟1，黄建华2.微波等离子体-原子发射光谱法测定 食用植物油中的多种微量金属元素[J].中国油脂,2021,46(5):.[LIU Hongwei1, HUANG Jianhua2.Determination of multi-trace metal element in edible vegetable oil by microwave plasma-atomic emission spectroscopy[J].China Oils and Fats,2021,46(5):.] |
| 微波等离子体-原子发射光谱法测定 食用植物油中的多种微量金属元素 |
| Determination of multi-trace metal element in edible vegetable oil by microwave plasma-atomic emission spectroscopy |
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| DOI： |
| 中文关键词: 关键词：食用植物油 微波等离子体-原子发射光谱 微量金属元素 光谱干扰 背景干扰 基体效应 |
| 英文关键词:Key words：edible vegetable oil microwave plasma-atomic emission spectroscopy trace metal element spectral interference background interference matrix effect |
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| 中文摘要: |
| 摘要：研究简单快速测定食用植物油中多种微量金属元素的方法。食用植物油样品经微波酸消解处理后采用微波等离子体-原子发射光谱法（MP-AES）测定消解液中微量金属元素Mg、Al、K、Na、Ca、Fe、Cu、Zn、Sr、Mn的含量。通过选择各元素的分析波长避免了大量光谱干扰，利用快速线性干扰校正（FLIC）技术校正了潜在光谱干扰和背景干扰，选择Y、La、Lu为内标元素校正基体效应，采用加标回收实验并利用电感耦合等离子体质谱法（ICP-MS）的对比分析结果评价了方法的准确性。结果表明，各元素的检出限在0.12~4.29 μg/L之间，加标回收率在95.4%~104.0%之间，相对标准偏差（RSD）小于等于4.1%，MP-AES和ICP-MS的分析结果无显著性差异。建立的分析方法具有分析成本低、检出限低、准确性好等特点，可用于食用植物油中多种微量金属元素含量的测定。 |
| 英文摘要: |
| Abstract：A rapid and simple analysis method was investigated for determining the content of multi-trace metal element in edible vegetable oil. The contents of trace metal elements such as Mg, Al, K, Na, Ca, Fe, Cu, Zn, Sr and Mn in edible vegetable oil samples were determined using microwave plasma-atomic emission spectroscopy (MP-AES) after microwave assisted acid digestion. A large number of spectral interferences were avoided by selecting the analysis wavelength. The potential spectral interference and background interference were corrected by using fast linear interference correction (FLIC) technology. Y, La and Lu were selected as internal standard elements to correct the matrix effect. The accuracy of the method was evaluated by the spike recovery experiment and the comparative analysis with the results of inductively coupled plasma-mass spectrometry (ICP-MS). The results showed that the limit of detection of analyte was 0.12-4.29 μg/L, the spiked recovery rate was 95.4%-104.0%, and the relative standard deviation (RSD) was less than or equal to 4.1%. There was no significant difference between the analysis results of MP-AES and ICP-MS. The developed method had the characteristics of low cost, low limit of detection and good accuracy, and it could be applied to the determination of multi-trace metal element in edible vegetable oil. |
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