Chemical components from different parts of Forsythia suspensa vahl with different extraction methods by gas-chromatography-mass spectrometry

With different extraction methods, chemical components from the branch, root and bark of Forsythia suspensa (Thunb.) Vahl were analyzed by gas chromatography-mass spectrometry (GC-MS). The result showed that there were a large number of chemical components in Forsythia suspense, in which there were also different components with different extraction solvent ethanol and benzene/ethanol, respectively. Exacted by ethanol vs. benzene/ethanol, the branch had 79 peaks and 55 chemical components in ethanol, and 31 peaks and 17 components in benzene/ethanol, respectively. The root had 32 peaks and 23 chemical components in ethanol, and 38 peaks and 25 components in benzene/ethanol. As to bark, there were 54 peaks and 39 components with ethanol, 25 peaks and 14 components with ethanol. There were also some common components in different parts with different solvent. It could be found that there were 3 and 7 common extracts in the branch, root and bark Forsythia suspense exacted by ethanol and benzene/ethanol, respectively. It was also found that the same part of Forsythia suspense could have common with different extracted methods. Extracted by ethanol and benzene/ethanol, the branch, root and bark of Forsythia suspense had 5, 7 and 12 common components, respectively.