“…Besides, another important issue is that traditional Vietnamese fish sauce often encounters technical barriers with some international quality standards, such as histamine level [16]. Currently, histamine has been detected by many methods, such as electrophoretic [17], thin layer chromatography [18], nuclear magnetic resonance (NMR) [19], photoluminescence CdTe quantum dots [20], colorimetry [21,22], enhanced Raman spectroscopy (SERS) [23], electrochemical [24], nanogold particles (AuNPs) [25], HLPC-UV [14,25,26], LCMS/MS [26], UHPLC-Q/TOF-MS [11], or UHPLC-MS/ MS [27]. Presently, the standard procedure for histamine analysis by UPLC-MS/MS has not been officially announced in Vietnam.…”