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Investigating sub-2 μm particle stationary phase supercritical fluid chromatography coupled to mass spectrometry for chemical profiling of chamomile extracts

Research output: Contribution to journalArticle

Michael D Jones, Bharathi Avula, Yan-Hong Wang, Lu Lu, Jianping Zhao, Cristina Avonto, Giorgis Isaac, Larry Meeker, Kate Yu, Cristina Legido-Quigley, Norman Smith, Ikhlas A Khan

Original languageEnglish
Pages (from-to)61-72
Number of pages12
JournalANALYTICA CHIMICA ACTA
Volume847
DOIs
Publication statusPublished - 17 Oct 2014

King's Authors

Abstract

Roman and German chamomile are widely used throughout the world. Chamomiles contain a wide variety of active constituents including sesquiterpene lactones. Various extraction techniques were performed on these two types of chamomile. A packed-column supercritical fluid chromatography-mass spectrometry method was designed for the identification of sesquiterpenes and other constituents from chamomile extracts with no derivatization step prior to analysis. Mass spectrometry detection was achieved by using electrospray ionization. All of the compounds of interest were separated within 15 min. The chamomile extracts were analyzed and compared for similarities and distinct differences. Multivariate statistical analysis including principal component analysis and orthogonal partial least squares-discriminant analysis (OPLS-DA) were used to differentiate between the chamomile samples. German chamomile samples confirmed the presence of cis- and trans-tonghaosu, chrysosplenols, apigenin diglucoside whereas Roman chamomile samples confirmed the presence of apigenin, nobilin, 1,10-epioxynobilin, and hydroxyisonobilin.

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