“…Capillary electrophoresis methods have been reported in recent years using detection systems such as contactless conductivity, electrochemiluminescence [100], and laser-induced fluorescence [101,102], as reviewed by Gauglitz et al [103]. Ion chromatography [104], electrochemical method, surface resonance-enhanced spectrometry, enzyme-linked immunosorbent assay also called ELISA methods [87], spectrophotometry [73,85], and fluorescent spectrometry [50,55,57,75,78,80,90,96] were also reported to detect GLY in current literatures. However, the selectivity of ion chromatography was limited.…”