Objective: To determinate the contents of seven components such as gallic acid

albiflorin and peoniflorin

and 24 trace elements in the medicinal plant Moutan Cortex from different areas

discuss the relationships between its various constituents

and provide a reference for the quality control of Moutan Cortex. Method: Microwave digestion-inductively coupled plasma mass spectrometry(ICP-MS) was employed to determine the contents of trace elements such as Fe and Mg; HPLC wavelength fusion method was used to determine the contents of gallic acid

albiflorin

paeoniflorin

1

2

3

4

6-penta-O-galloyl-beta-d-glucopyranose

benzoic acid

benzoyl paeoniflorin

and paeonol. Grey correlation degree model and correlation analysis method were employed to comprehensively evaluate the quality of Moutan Cortex from the different areas and analyze the correlation between the contents of main components and trace elements. Result: There were significant differences in part principal components and the contents of trace elements in Moutan Cortex from different areas and processing methods (P<0.05). The gray correlation degree model was stable

and there were significant or extremely significant positive correlation or negative correlation between different components and trace elements in Moutan Cortex (P<0.05). Conclusion: The models of grey correlation degree and correlation analysis method can provide sufficient basis and reference for the selection of Moutan Cortex.