Hops prenylflavonoids, epimedium and skullcap flavonoids, flavanonols, isoflavones, methoxylated flavones, flavonoid group results and panels.
| Tests | Xanthohumol, isoxanthohumol, 8- and 6-prenylnaringenin, icariin, baicalin, skullcap flavonoids, dihydromyricetin, taxifolin, isoflavones, 5,7-dimethoxyflavone, combretol, flavonoids as icariin, rutin or vitexin, flavonoid panels, Morosil flavanones and hydroxycinnamic acids, flavonol glycosides limit |
|---|---|
| Method | HPLC, UPLC or UV/Vis |
| Results | Reported against your specification or label claim, with pass/fail where limits apply. |
| Price | Quoted per project |
The chromatographic tests separate the named compounds and measure them against reference standards. The flavonoids as icariin, rutin and vitexin tests give a UV/Vis group result expressed as the named reference compound. The baicalin UV/Vis test is described in its section.
Some of these compounds are positional isomers or form from one another. They are separated, and reported individually or as a sum, as your specification states.
Measures xanthohumol, a prenylated chalcone of hops (Humulus lupulus), in hops extract by HPLC.
Measures isoxanthohumol, a prenylflavanone that forms from xanthohumol, in hops extract by HPLC.
Measures these four hops prenylflavonoids by HPLC and reports each. 8-Prenylnaringenin and 6-prenylnaringenin differ only in the position of the prenyl group; they are separated, and reported individually or as a sum, as your specification states.
Measures icariin, a prenylated flavonol glycoside of epimedium (horny goat weed), by HPLC as a single compound.
A UV/Vis group result for flavonoids expressed as icariin, for example in epimedium materials. It does not identify or separate individual flavonoids; for icariin itself, see the HPLC test.
Measures baicalin, a flavone glucuronide of Chinese skullcap (Scutellaria baicalensis), by HPLC as a single compound.
Determines baicalin in skullcap extract by UV/Vis, reported as baicalin. The exact procedure is confirmed at quote; a separate baicalin test by HPLC is also listed on this page.
Measures skullcap flavonoids by HPLC. Tell us the species and which flavonoids your specification names.
Measures dihydromyricetin (ampelopsin), a flavanonol, by HPLC as a single compound.
Measures taxifolin (dihydroquercetin), a flavanonol, by UPLC as a single compound.
Measures isoflavones, for example in soy or red clover materials, by HPLC and reports a total. Tell us which isoflavones the total includes and whether it is stated as glycosides or aglycones.
Measures 5,7-dimethoxyflavone, a methoxylated flavone found for example in black ginger (Kaempferia parviflora), by HPLC as a single compound.
Measures combretol, a methoxylated flavonol, by UPLC as a single compound.
A UV/Vis group result for flavonoids in elderflower (Sambucus nigra flower), expressed as rutin. It does not identify individual flavonoids.
A UV/Vis group result for flavonoids in passion flower (Passiflora incarnata), expressed as vitexin. It does not identify individual flavonoids.
Measures a panel of named flavonoids by UPLC and reports each. The compounds in the panel are agreed at quote.
Measures an additional set of named flavonoids by UPLC and reports each. The compounds are agreed at quote.
Measures flavanones and hydroxycinnamic acids in Morosil ingredient material by HPLC. Tell us which compounds your specification names.
An HPLC limit test for flavonol glycosides that come from the aerial parts of a plant, used where a specification limits material from those parts. Tell us the material and the monograph or specification.
Send the material sealed, labeled and protected from light.
Tell us the material or extract and the label claim or specification, including any compound a group result is to be expressed as. We confirm the sample amount at quote.
Questions about a sample or a method, call 360-967-7010 or email [email protected].
