Achalanant, A. and Seelanan, P. (2023) “The Study of Alternative Internal Standard for Quantitative Analysis of Alum-Contaminated Methamphetamine Hydrochloride by Gas Chromatography ”, Suan Dusit Graduate School Academic Journal. Bankok, Thailand, 19(2), pp. 161–177. available at: https://so19.tci-thaijo.org/index.php/SDUGSAJ/article/view/57 (accessed: 10 October 2026).