1. Quality analysis of Polygala tenuifolia root by ultrahigh performance liquid chromatography–tandem mass spectrometry and gas chromatography–mass spectrometry 
Dan Wu, Jirui He, Yueming Jiang, Bao Yang 
Journal of Food and Drug Analysis 
Volume 23, Issue 1, Pages (March 2015)
DOI: /j.jfda
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2. Fig. 1
Ultrahigh-performance liquid chromatography–tandem mass spectrometry and gas chromatography–mass spectrometry profiles of Polygala tenuifolia root. (A) Total ion chromatogram analyzed by ultrahigh-performance liquid chromatography–tandem mass spectrometry; (B) total ion chromatogram analyzed by gas chromatography–mass spectrometry.
Journal of Food and Drug Analysis  , DOI: ( /j.jfda )
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3. Fig. 2
Structures of characteristic metabolites in Polygala tenuifolia root.
Journal of Food and Drug Analysis  , DOI: ( /j.jfda )
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4. Fig. 3
Plots of PCA on semipolar and volatile metabolites of Polygala tenuifolia root. (A) Loading plot and score plot are the results of semipolar metabolites; (B) loading plot and score plot are the results of volatile metabolites.
Journal of Food and Drug Analysis  , DOI: ( /j.jfda )
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