Normal-phase and reversed-phase high performance liquid chromatography at elevated temperature : separation of tocopherols and tocotrienols / by Mohd. Marsin Sanagi, 1956-, See, Hong Heng, Wan Aini Wan Ibrahim, Ahmedy Abu Naim, Oils and Fats International Congress (OFIC-2004) (2004 : Putra World Trade Centre, Kuala Lumpur)