Quantitative Analysis of Matrine and Oxymatrine in Sophora flavescens Extract and Its Biopesticides

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Successive cartridge clean-up method for the simultaneous determination of matrine and oxyma- trine in biopesticides containing Sophora flavescens extract was developed and validated by UPLC. The clean-up method was established with ENVI-Carb (0.5 g) and
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