Abstract
Sea buckthorn (Hippophae rhamnoides L.) pulp oils (SPOs) are rich in a variety of beneficial bioactive ingredients. Nevertheless, SPOs would be exposed to plastic equipment during processing, resulted in increasing phthalates contents and edible risk, as well as affecting oil quality. For these reasons, the effects of two stages steam distillation (SD2) and two stages molecular distillation (MD2) on phthalic acid esters (PAEs) content were investigated and compared in the present work. Compared with SD2, MD2 showed higher removal rates of seven selected PAEs from the SPO. Even if the initial concentration of DBP and DEHP in R-SPO were 1.626 and 10.933 mg/kg respectively, the concentration of DBP and DINP could be reduced below the limit set by China government after treated with MD2. Besides that, there was no trans-fatty acids generated in SPO during the distillation process.
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