Tocopherol Case Study

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Results and Discussion Original Egyptian monovarietal CEVOO and adulterated it with addition 5, 10, or 20% by wt from sunflower (SNF) or soybean (SBO) oils as adulterants were studied. Tocopherols are minor constituents in vegetable oils and their composition may be proof for oils. Tocopherols are hetero acid compounds with high molecular weight that are namely, α, β, γ, and δ- tocopherols. α-Tocopherol is unique characteristic of CEVOO (97.77%) similar to SNF (96.75 %) of the total tocopherol. These results agree with Benincasa et al (2011) they found that Egyptian CEVOO have α-tocopherol more than 95%. As tocopherol composition of SBO contains mainly γ- and -tocopherols (40.9 and 34.67% respectively).Table (1), shows addition of SBO to CEVOO, it was noticed that the level of α-tocopherol not markedly changed. -Tocopherols, not found in CEVOO, but it appears at the level of 5.52, 9.96 and 16.71%, in the simulated adulterated CEVOO with SBO at 5, 10 and 20% w/w respectively. Also, it was found that an increases in the amounts of γ –tocopherol from 0.94% for CEVOO to 7.63, 12.16 and 20.2%…show more content…
The addition of SBO or SNF to CEVOO caused decrease in Af factor (Table 3). These results demonstrated that Af factor is a valid parameter that could be used to detect adulteration of CEVOO, even its content of campesterol and stigmasterol are 0.7% and 0.2% respectively. Concerning the R ratio and AF factor, it could be noticed that each pure oil had its own characteristic ratio. On the other side, these ratios varied in the admixtures and their values depending on the mixing ratio. It is conclusively evident that Af factor and R ratio can indicate precisely the presence of adulteration of olive oil. These results demonstrated that Af factor and R ratio could be used to detect adulteration of CEVOO. These findings are in harmony with those obtained by Imai et

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