There are issues with conjugation phase II but I am focused on intestinal bacterial role. The markers could include catechols, flavanols, flavonols. Particularly pyrogallol and pyrocatechol and in urine and serum.
Robin Joshi
Use C-18 cartridge for purification of polyphenols form serum or urine followed by LC-MS.
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Roberto Veloso Pita
This article can help you.
Determination of Cranberry Phenolic Metabolites in Rats by Liquid Chromatography–Tandem Mass Spectrometry: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3165050/
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Mark E Obrenovich
Yes, the concept of derivatizing by glucuronidation may sole the problem of commercially available compounds. Many thanks.
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