Production of peanut oils
Samples of peanut were supplied in February 2019 by a marketing cooperative (Chiayi, Taiwan). The peanuts are separated into batches, each batch were being weighted separately to 5kg, and roasted in a roasting machine at 120°C, 140°C, or 160°C for 10 min individually. Then, each sample of the roasted peanut was pressed for its oil using a mechanical pressing machine, and after filtered, the oil is finally collected.