Nguyen, T.-N., Nguyen, C.-H. and Nguyen, N.-Q. 2022. Diquat and Paraquat Analysis in Rice using a Zwitterionic Hydrophilic Interaction Chromatography – tandem Mass Spectrometry. Indonesian Journal of Chemical Analysis (IJCA). 5, 1 (Mar. 2022), 29–40. DOI:https://doi.org/10.20885/ijca.vol5.iss1.art4.