Ha Thi Thu Hoai, Nguyen Trong Nghia, and Nguyen Thi Quynh Hoa. 2022. “PROCEDURE OPTIMIZATION FOR DETERMINATION OF PERFLUOROOCTANE SULFONIC ACID (PFOS) AND PERFLUOROOCTANOIC ACID (PFOA) IN PAPER – BASED FOOD PACKAGING SAMPLES”. UTEHY Journal of Applied Science and Technology 36 (December), 27-32. http://tapchi.utehy.edu.vn/index.php/jst/article/view/568.