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| 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 |
| KeyWord:sesame oil adulteration recognition isotope ratio mass spectrometry identification soybean oil corn oil |
| FundProject:北京市农林科学院青年科学基金项目（QNJJ201932） |
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| Abstract: |
| 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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