CHODCHOY, P. Method Validation for the Quantification of Mitragynine in Blood and Urine by Using Online Solid Phase Extraction Liquid Chromatography-Mass Spectrometry. Journal of Applied Research on Science and Technology (JARST), [S. l.], v. 20, n. 2, p. 88–101, 2021. DOI: 10.14456/jarst.2021.8. Disponível em: https://ph01.tci-thaijo.org/index.php/rmutt-journal/article/view/241642. Acesso em: 27 apr. 2025.