期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 60, 期 2, 页码 544-553出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf204612t
关键词
quantitation; UV absorbance; flavonol glycosides; flavone glycosides; hydroxycinnamic acid derivatives; molar relative response factors; foods
资金
- Agricultural Research Service of the U.S. Department of Agriculture
- Office of Dietary Supplements of the National Institutes of Health
A general approach was developed to quantify hydroxycinnamic acid derivatives and the glycosides of flavonols and flavones using UV molar relative response factors (MRRFs). More than 90 standards were analyzed by LC-MS and divided into five groups based on the lambda(max) of their band I absorbance profiles. For each group, a commercially available standard was chosen as the group reference standard. Response factors were determined for each standard in each group as purchased (MRRF) and, when possible, after vacuum drying (MRRFD). The MRRFD values for 17 compounds whose lambda(max) values fell within +/- 2 nm of the group reference standard were 1.01 +/- 0.03. MRRF values for compounds whose lambda(max) values fell within +/- 10 nm of the group reference standard were 0.96 +/- 0.13. Group reference standards were used to quantify 44 compounds in Chinese lettuce, red onion, and white tea. This approach allows quantitation of numerous compounds for which there are no standards.
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