Survey of Flavonoids and Their Distribution in Different Kinds of Onions Using High Performance Liquid Chromatography and Gas Chromatography Mass Spectrometry.

<p>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.</p>

Name thesis:degree_name

MS (Master of Science)

Level thesis:degree_level

Thesis - unrestricted

Discipline thesis:degree_discipline

Chemistry

Year dc:date.issued

2011

Author dc:creator

• Racharla, Archana

• Onion
• Alliin
• High Performance Liquid Chromatography
• Gas Chromatography Mass spectrometry
• Flavonoid
• Analytical Chemistry
• Chemistry
• Physical Sciences and Mathematics

Statement dc:rights

• Copyright by the authors.

Repository record dc:identifier

https://dc.etsu.edu/etd/1376

OAI identifier oai:identifier

oai:dc.etsu.edu:etd-2567