This study (USD$39.95 purchase required) reports a rapid and sensitive ultra-performance liquid chromatography-tandem triple quadrupole mass spectrometry (UPLC-MS/MS) method to detect adulteration of high-value camellia oil and olive oil with lower-cost sesame, soybean, and peanut oils.
Four characteristic markers-sesamin and sesamolin (sesame oil), 4′,7-dimethoxyisoflavone (soybean oil), and sativanone (peanut oil) were identified and quantified with high specificity.
The authors report limits of detection of 0.025%–0.10% for sesame oil, 1.0%–5.0% for soybean oil and peanut oil. Adulteration model experiments and method comparison analysis confirmed reliable multi-component adulteration detection in complex matrices.
Analysis of 106 commercial samples revealed adulteration rates of 16.0% (camellia oil) and 25.0% (olive oil), primarily with soybean oil. The analysis of two law enforcement samples confirmed adulteration with soybean oil, consistent with the official regulatory findings.
The authors conclude that this approach overcomes limitations of traditional methods.
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