Aulia S, Primaharinastiti R, Purwanto DA. Development and Validation GC/MS Method for Methamphetamine Analysis in Urine by Miniaturization QuEChERS. sci. technol. indones. [Internet]. 2023 Jul. 6 [cited 2026 Aug. 2];8(3):451-60. Available from: https://sciencetechindonesia.com/index.php/jsti/article/view/758