| Summary: | 碩士 === 國立嘉義大學 === 食品科學系碩士班 === 92 === Methods for evaluating edible oils was developed by FT-Raman spectroscopy. First of all, the feasibility of FT-Raman in edible oils was tested by measuring the degree of unsaturation of oil standards of which results were compared with conventional titration methods (Iodine Value Determination, IV). The consistency (R2=0.9825) between FT-Raman method and IV methods suggests that FT-Raman might serve a powerful tool for evaluating oil quality.
The established FT-Raman method was then used to determine the authenticity of Ku-Char oils (Camellia Oleifera Able) collected from various markets. By determining the number of double bonds (NDB), i.e., the degree of unsaturation, in the binary mixture of Ku-Char oil and various edible oils, we are more confident in applying FT-Raman in solving the adulteration problems of Ku-Char oils. Additionally, characterization of various oil compounds was carried out, all proves that FT-Raman provides a direct, rapid and free of hazardous chemicals application.
Finally, combining FT-Raman with the principal component analysis (PCA) of multivariate statistical analysis was approached to solve the adulteration problems in Ku-Char oils. Both NDB and PCA results were in highly consistency.
Based on the aforementioned results, FT-Raman proved itself a powerful technique for oil analysis since each measurement could be completed in 3 minutes without any sample modifications.
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