Research Article

Simultaneous Determination of 32 Pyrrolizidine Alkaloids in Two Traditional Chinese Medicine Preparations by UPLC-MS/MS

Figure 4

Xiaoyao tablet preparation extraction method, extraction time, and extraction solvent selection results. (a) Extraction solvent selection results, (b) extraction method selection results, and (c) extraction time selection results. The numbering of the 30 target analytes in Figure 4 is same as in Figure 3.
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