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. Author manuscript; available in PMC: 2014 Aug 25.
Published in final edited form as: J Chromatogr A. 2006 Sep 27;1135(1):27–35. doi: 10.1016/j.chroma.2006.09.015

Fig. 4.

Fig. 4

Representative HPLC–MS chromatograms of mixed standards and extract of Platycodi Radix in negative ion ESI mode. (A) mixed standards; (B) extract of Platycodi Radix; (C) selected ion monitoring of extract from Platycodi Radix. Selected ions as intact molecular ions of platycosides (m/z 1415, 1547, 1253, 1385, 1091, 1223, 1207, 1265, 1249) with the retention times of corresponding constituents presented in a chromatogram (C). The numbers indicate each platycoside in Fig. 1.