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LC/MS analysis of the alkaloid and water fractions. Photodiode array (PDA) total scan chromatograms, total ion chromatograms, and extracted ion chromatograms at m/z 249.1967 ± 0.003 and 265.1916 ± 0.003 to detect matrine and oxymatrine, respectively, in the alkaloid fraction and the water fraction. *A specific peak of matrine; #a specific peak of oxymatrine.
