Determination of Essential Oil Composition from Osmanthus fragrans Tea by GC-MS Combined with a Chemometric Resolution MethodReport as inadecuate




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1

Pharmaceutical School of Xianning University, Xianning 437100, China

2

Research Center of Modernization of Chinese Herbal Medicines, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

3

Xinjiang Institute for Food and Drug Control, Urumqi 830002, China





*

Author to whom correspondence should be addressed.



Abstract The essential oils of the Osmanthus fragrans tea OFT, Osmanthus fragrans OF and green tea GT had been extracted by steam distillation and analyzed by gas chromatography-mass spectrometry GC-MS with the help of heuristic evolving latent projections HELP, an effective chemometric resolution method CRM. The overlapping peak clusters were resolved into pure chromatograms and pure mass spectra with HELP. The qualitative analysis was performed by similarity searches in the National Institute of Standards and Technology NIST mass spectra database with the obtained pure mass spectrum of each component. Identification of some compounds was also assisted by comparison of temperature-programmed retention indices PTRI with authentic standards included in our own laboratory database under construction. The quantitative results were obtained by overall volume integration OVI method. A total of 67, 73 and 53 components in essential oils of the OFT, OF and GT were identified, accounting for 90.83%, 93.65% and 89.97% total contents of the essential oil of OFT, OF and GT, respectively.

Keywords: Osmanthus fragrans tea; essential oil; GC-MS; chemometric resolution method; temperature-programmed retention indices Osmanthus fragrans tea; essential oil; GC-MS; chemometric resolution method; temperature-programmed retention indices





Author: Chun-Di Hu 1,2, Yi-Zeng Liang 2,* , Fang-Qiu Guo 2, Xiao-Ru Li 2 and Wei-Ping Wang 3

Source: http://mdpi.com/



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