Changes in PAH and 3-MCPDE contents at the various stages of Camellia oleifera seed oil refining

Abstract

Objectives Polycyclic aromatic hydrocarbons (PAHs) and 3-chloropropanoldiol ester (3-MCPDE) were studied in camellia oil. It is important to study the changes in the content of PAHs and 3-MCPDE at different refining stages (from crude oil to the final refined oil product) to elucidate the influence of the refining procedures on their change. Materials and Methods The PAHs and 3-MCPDE in camellia oil from different refining stages (from crude oil to the product) of a plant were analysed by GC–MS and calculated by the internal standard method. Results The overall PAH content was 79.64±2.43 µg/kg in crude camellia oil. After refining treatment, the PAH content decreased to 18.75±0.55 µg/kg. The 3-MCPDE content increased during the refining process from 0 mg/kg in the crude oil to 4.62 mg/kg in the refined oil product. Conclusions This is the first study to simultaneously monitor changes in both the PAH and 3-MCPDE contents during the production of camellia oil. These results confirmed the effectiveness of the refining method on PAH removal and the increase in 3-MCPDE at high temperature. It is suggested that novel processing methods or refining parameters need further optimization to decrease the overall concentrations of PAHs and 3-MCPDE in camellia oil.

Virgin Camellia Seed Oil Improves Glycolipid Metabolism in the Kidney of High Fat-Fed Rats through AMPK-SREBP Pathway

“…The standard refining process of pressed CO including the following steps [28,29]: Degumming: The crude oil was heated to 60 • C. Three percent (v/v) soft water at 80 • C was added to the oil. The mixture was stirred for 30 min and then centrifuged at 3000 rpm, 55 • C for 20 min to separate the oil and gum.…”