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Applied Biological Chemistry
Fig. 2 | Applied Biological Chemistry

Fig. 2

From: A LC–ESI–MS/MS analysis procedure coupled with solid phase extraction and MeOH extraction method for determination of pyrrolizidine alkaloids in Tussilago farfara and Lithospermi erythrorhzion

Fig. 2

Flow charts of two extraction methods developed to extract PAs from herbal medicines; MCX-SPE extraction method applied for determination of PAs that are not contained in the herbal medicines (A) and the new extraction method applied for determination of PAs are contained with high content in the herbal medicines (B)

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