Degree Name
MS (Master of Science)
Program
Chemistry
Date of Award
12-2011
Committee Chair or Co-Chairs
Chu-Ngi Ho
Committee Members
Peng Sun, Ningfeng (Peter) Zhao
Abstract
This research is done to determine the distribution of flavonoids in diverse varieties of onions (commercial and wild onions). Reflux extraction method was done on dried onions and the abstracts were analyzed subsequently by high performance liquid chromatography (HPLC) and gas chromatography-mass spectrometry (GCMS). Statistical calculations were done to see if there are significant differences in the varieties of onions studied from the chromatographic profiles obtained. The chromatograms obtained were patterned using visual observations, scatter plot study, correlation co-efficient, and ANOVA to evaluate the significant difference of the distribution of flavonoids in varieties of onions. The organic white onions seem to have closer flavonoids profile to that of natural wild onions with a corelation coefficient of 0.99 from HPLC data and 0.88 from the GCMS data. The ANOVA results also support these conclusions. However, natural wild onions tend to have more constituents that can be beneficial.
Document Type
Thesis - unrestricted
Recommended Citation
Racharla, Archana, "Survey of Flavonoids and Their Distribution in Different Kinds of Onions Using High Performance Liquid Chromatography and Gas Chromatography Mass Spectrometry." (2011). Electronic Theses and Dissertations. Paper 1376. https://dc.etsu.edu/etd/1376
Copyright
Copyright by the authors.