Nondestructive Determination of Tocopherol and Tocotrienol in Vitamin E Powder Using Near- and Mid-Infrared Spectroscopy by Saowaluk Rungchang, Sila Kittiwachana, Sujitra Funsueb, Chitsiri Rachtanapun, Juthamas Tantala, Phumon Sookwong, Laichheang Yort, Chayanid Sringarm, Sudarat Jiamyangyuen

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