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| 稳定同位素质谱法鉴别芝麻油中掺杂大豆油、玉米油的研究 |
| Identification of adulterated soybean oil and corn oil in sesame oil by isotope ratio mass spectrometry |
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| DOI：10.12166/j.zgyz.1003-7969/2020.03.008 |
| 中文关键词: 芝麻油 掺杂识别 稳定同位素质谱法 鉴定 大豆油 玉米油 |
| 英文关键词:sesame oil adulteration recognition isotope ratio mass spectrometry identification soybean oil corn oil |
| 基金项目:北京市农林科学院青年科学基金项目（QNJJ201932） |
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| 中文摘要: |
| 利用稳定同位素质谱法进行芝麻油掺杂鉴别的研究。选定C3植物油大豆油、C4植物油玉米油作为掺杂油，测定了芝麻油掺入质量分数分别为5%、10%、15%、20%、30%、50%、80%掺杂油的δ13C、δ2H、δ18O值。结果表明：用δ13C、δ2H二维稳定同位素比值对大豆油掺杂油样品进行判别，比仅依靠单一δ13C值或δ2H值进行判别的灵敏度有所提升，同时发现δ18O值与掺杂油的比例没有明显的线性关系。二元回归模型可以对芝麻油中掺杂10%大豆油或5%玉米油定量判别。 |
| 英文摘要: |
| The adulteration recognition of sesame oil was identified by isotope ratio mass spectrometry. Soybean oil of C3 vegetable oil and corn oil of C4 vegetable oil were selected as doping oil. The values of δ13C,δ2H and δ18O of sesame oil with mass ratios of 5%, 10%, 15%, 20%, 30%, 50% and 80% doping oil were determined respectively. The results showed that the sensitivity of discriminating adulterated soybean oil samples by two-dimensional stable isotope values of δ13C and δ2H was higher than that by single value of δ13C or δ2H. At the same time, it was found that there was no obvious linear relationship between the value of δ18O and the ratio of adulterated oil. The two-dimensional regression model could quantitatively identified 10% soybean oil or 5% corn oil in the sesame oil. |
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