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The UHPLC–QToF-MS analysis of pyrrolizidine alkaloids (PAs) from various parts of 37 botanicals and 7 products was performed. A separation by LC was achieved using a reversed-phase column and a gradient of water/acetonitrile each containing formic acid as the mobile phase. MS–MS detection was used because of its high selectivity, and ability to provide structural information. Free base and N-oxides...
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