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A sensitive and precise high performance liquid chromatography (HPLC)-electrochemical detection (ECD) method has been developed for the simultaneous determination of four isoquinoline alkaloids including berberine, jatrorrhizine, coptisine and palmatine in Chinese medicine Coptis chinensis. The typical HPLC analysis was performed on WondaSil ® C18-WR column (250×4.6mm, 5μm) with the mobile...
A novel method was developed for the simultaneous determination of kynurenine and tryptophan by high‐performance liquid chromatography with electrochemical detection at multi‐wall carbon nanotube (MWCNT)‐modified glassy carbon electrode. The separation and detection conditions were optimized. The typical HPLC experiments were conducted by using a reversed‐phase ODS column with a mobile phase consisting...
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