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. Author manuscript; available in PMC: 2020 Jul 27.
Published in final edited form as: J Pharm Biomed Anal. 2019 Jun 20;174:541–551. doi: 10.1016/j.jpba.2019.06.025

Fig. 1.

Fig. 1.

Flowchart of UPLC-QTOF-MS-based tongue coating metabolomics analysis approach for the CG group and HC group. The details of the sample running sequence is shown in “B”: the red, green, blue and yellow color represent the blank solution, the QC1 samples, the real samples and the QC2 samples, respectively.