Validated reversed phase LC method for quantitative analysis of polymethoxyflavones in citrus peel extracts.
Polymethoxyflavones (PMFs), which exist exclusively in the citrus genus, have biological activities including anti-inflammatory, anticarcinogenic, and antiatherogenic properties. A validated RPLC method was developed for quantitative analysis of six major PMFs, namely nobiletin, tangeretin, sinensetin, 5,6,7,4'-tetramethoxyflavone, 3,5,6,7,3',4'-hexamethoxyflavone, and 3,5,6,7,8,3',4'-heptamethoxyflavone. The polar embedded LC stationary phase was able to fully resolve the six analogues. The developed method was fully validated in terms of linearity, accuracy, precision, sensitivity, and system suitability. The LOD of the method was calculated as 0.15 microg/mL and the recovery rate was between 97.0 and 105.1%. This analytical method was successfully applied to quantify the individual PMFs in four commercially available citrus peel extracts (CPEs). Each extract shows significant difference in the PMF composition and concentration. This method may provide a simple, rapid, and reliable tool to help reveal the correlation between the bioactivity of the PMF extracts and the individual PMF content.
Wang
Zhenyu
Z
Discovery Chemistry, Hoffmann-La Roche Inc. Nutley, NJ, USA. zhenyu.wang@roche.com
Li
Shiming
S
Ferguson
Stephen
S
Goodnow
Robert
R
Ho
Chi-Tang
CT
D002853:Chromatography, Liquid / Q000379:methods*; D002957:Citrus / Q000033:anatomy & histology* / Q000737:chemistry*; D047309:Flavones / Q000032:analysis* / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008745:Methylation; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D012680:Sensitivity and Specificity
D047309:Flavones; D010936:Plant Extracts; D010100:Oxygen