| Summary: | 碩士 === 國立臺灣大學 === 農業化學研究所 === 99 === The aim of this study is to develop an analytical approach for discriminating sesame oil blended with soybean oil or canola oil. Firstly we established a promising HPLC-ELSD chromatographic condition for the detection of triacylglycerol (TAG) species of oil samples. TAG species of all oil samples were then determined under the conditions. Based on the composition of TAG species of oil samples, three unique peaks assigned as LLnL, OLnL and PLnL which did not appear on the chromatogram of any sesame oil samples represented that the characteristic components of soybean oil could be employed as judging the adulteration of sesame oil with soybean oil. Similarly, the unique components, OLnL and OLnO of canola oil could be used for judging the adulteration of sesame oil with canola oil. Additionally, a statistical method, namely discriminant analysis of principal components (DAPC), using TAG species of oil sample as parameters was employed for qualitative analysis of sesame oil blended with soybean oil or canola oil. The results showed that this statistical method was feasible and promising to judge the adulteration of sesame oils with soybean oils or canola oils.
|
|---|
