Quercetin and its glycosides, luteolin and apigenin with their O- and C-glycosides, fisetin and taxifolin.
| Tests | Quercetin, rutin, isoquercetin, hyperoside, limit of quercetin and rutin, luteolin, apigenin and its glycosides, vitexin, isovitexin, orientin, isoorientin, vitexin-2''-O-rhamnoside, fisetin, taxifolin |
|---|---|
| Method | HPLC or UPLC |
| Results | Reported against your specification or label claim, with pass/fail where limits apply. |
| Price | Quoted per project |
Each test separates the named compounds by liquid chromatography and measures them against reference standards. The quercetin and rutin limit test reports results against the limits in your specification.
Several of these compounds are glycosides of the same aglycone or isomers of each other, so each has its own test.
Measures quercetin, a flavonol aglycone, by UPLC as a single compound.
Measures rutin, the 3-O-rutinoside of quercetin, by UPLC as a single compound. The USP Rutin monograph states its content on the anhydrous basis and lists rutin and quercetin reference standards.
Measures isoquercetin, the 3-O-glucoside of quercetin, by UPLC as a single compound.
Measures hyperoside, the 3-O-galactoside of quercetin, by UPLC as a single compound.
Measures free quercetin and rutin by HPLC and compares them with the limits in your specification. It is a limit test: the result is reported against those limits.
Measures luteolin, a flavone aglycone, by UPLC as a single compound.
Measures apigenin, a flavone aglycone, by HPLC as a single compound.
Measures apigenin-7-O-glucoside, a glycoside of apigenin, by HPLC as a single compound.
Measures apigenin and related apigenin compounds by HPLC. Tell us which apigenin compounds your specification names and whether it states each one or a total.
Measures vitexin, an 8-C-glucoside of apigenin, by UPLC as a single compound.
Measures isovitexin, the 6-C-glucoside of apigenin and an isomer of vitexin, by UPLC as a single compound.
Measures orientin, an 8-C-glucoside of luteolin, by UPLC as a single compound.
Measures isoorientin, the 6-C-glucoside of luteolin and an isomer of orientin, by UPLC as a single compound.
Measures vitexin-2''-O-rhamnoside, a rhamnoside of vitexin, by UPLC as a single compound.
Measures vitexin, vitexin-2''-O-rhamnoside and hyperoside together by HPLC, each reported against your specification.
Measures fisetin, a flavonol aglycone, by UPLC as a single compound.
Measures taxifolin (dihydroquercetin), a flavanonol, by UPLC as a single compound.
Send the material sealed, labeled and protected from light.
Tell us the material or extract and the specification or label claim. We confirm the sample amount at quote.
Questions about a sample or a method, call 360-967-7010 or email [email protected].
