( 2008 ) reported that among the different isomers of tocopherol, only the amount of alpha tocopherol increased during the purification process and other isomers followed a decreasing trend.
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Different effect of chemical refining process on Baneh (<i>Pistacia atlantica var mutica</i>) kernel oil: Regeneration of tocopherols.
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As seen, an increasing trend was observed in the gumming and neutralization due to the presence of air, heat, humidity, and light during these stages and the increase of the formation of the initial oxidation compounds (Zhu et al., 2016 ).