Volatile composition is an important feature that determines flavor, which actively affects the overall evaluation of chrysanthemum tea. In this study, HS-GC-IMS (headspace-gas chromatography-ion mobility spectrometry) was performed to characterize the volatile profiles of different chrysanthemum tea subtypes. Forty-seven volatiles of diverse chemical nature were identified and quantified. Partial least squares discriminant analysis (PLS-DA) revealed that four chrysanthemum teas were distinct from each other based on their volatile compounds. Furthermore, this work provides reference methods for detecting novel volatile organic compounds in chrysanthemum tea plants and products.
SummaryDirect separations of the enantiomers of cetirizine and related compounds have been achieved by reversed-phase HPLC on the Chiralcel OD-R, a polysaccharide-derived chiral stationary phase; the mobile phase was usually perchlorate solution supplemented with acetonitrile. Resolution of the enantiomers of cetirizine and related compounds was good. The effect of the acetonitrile content of the mobile phase was investigated, and the effect of the structure of the chiral compounds on their behavior on the Chiralcel OD-R column is discussed.
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