Anthocyanins, proanthocyanidins, procyanidins, punicalagins, ellagic acid, tannins and total polyphenols in fruit, seed, bark and tea materials and branded ingredients.
| Tests | Bilberry, elderberry, black rice, Delphinol and Morosil anthocyanins; grape seed, maritime pine, pine bark, cranberry, tart cherry and hawthorn proanthocyanidins or procyanidins; total polyphenols as gallic acid; tea polyphenols as ethyl gallate; total polyphenols in Fitnox; punicalagins; ellagic acid; hydrolysable tannins in Capros; theobromine |
|---|---|
| Method | HPLC or UPLC; UV/Vis or Folin-Ciocalteu for the estimates |
| Results | Reported against your specification or label claim, with pass/fail where limits apply. |
| Price | Quoted per project |
The HPLC and UPLC content assays separate the named compounds and measure them against reference standards. The maritime pine identification compares the chromatographic profile of the sample with that of a reference and gives an identification, not a content value. The UV/Vis and Folin-Ciocalteu tests are estimates of a compound group, described in their sections.
Proanthocyanidin and polyphenol results depend on the method and the reference compound, so results from different methods are not interchangeable. Tell us the method your specification uses.
Measures anthocyanosides (anthocyanin glycosides) and anthocyanidins (their aglycones) in bilberry by HPLC. The USP Powdered Bilberry Extract monograph describes that extract as prepared from the ripe fruits of Vaccinium myrtillus and calculates anthocyanosides as cyanidin-3-O-glucoside chloride and anthocyanidins as cyanidin chloride.
Measures anthocyanosides and cyanidin in elderberry materials by HPLC. Tell us the species, the plant part and the specification you report against.
Measures oligomeric proanthocyanidins in grape seed extract by HPLC. USP describes Grape Seeds Oligomeric Proanthocyanidins as a fraction of an extract of the ripe seeds of Vitis vinifera and states its content on the anhydrous basis.
An identity test for maritime pine extract that compares the HPLC profile of the sample with that of a reference. USP describes maritime pine as the bark of the stems of Pinus pinaster and lists a Maritime Pine Extract reference standard. The result is an identification, not a content value.
A UV/Vis estimate of procyanidins in maritime pine bark or extract. The result reflects the combined response of the prepared sample solution, so other compounds that respond in the same way can affect it; it does not identify individual compounds. The USP Maritime Pine and Maritime Pine Extract monographs state procyanidins on the dried basis; tell us which material and specification apply.
A UV/Vis estimate of proanthocyanidins in pine bark materials. The result reflects the combined response of the prepared sample solution, so other compounds that respond in the same way can affect it; it does not identify individual compounds. Tell us the species and the specification you report against.
A UV/Vis estimate of proanthocyanidins in cranberry materials. The result reflects the combined response of the prepared sample solution, so other compounds that respond in the same way can affect it; it does not identify individual compounds. Proanthocyanidin results depend strongly on the method and the reference used, so tell us the specification you report against.
A UV/Vis estimate of proanthocyanidins in tart cherry materials. The result reflects the combined response of the prepared sample solution, so other compounds that respond in the same way can affect it; it does not identify individual compounds.
A UV/Vis estimate of procyanidins in hawthorn berries, expressed as cyanidin chloride. The result reflects the combined response of the prepared sample solution, so other compounds that respond in the same way can affect it; it does not identify individual compounds.
A colorimetric estimate of total polyphenols using the Folin-Ciocalteu reagent, expressed as gallic acid. The reagent reacts with phenolic compounds and with other reducing substances such as ascorbic acid, so the result is not specific to any one compound class and does not identify individual compounds.
Measures punicalagin A and punicalagin B by HPLC and reports their sum. Tell us whether your specification states the sum or each form.
Measures ellagic acid by HPLC as a single compound. Free ellagic acid is a different result from ellagic acid released from ellagitannins; tell us which your specification means.
Measures ellagic acid, punicalagins and theobromine together by HPLC, each reported against your specification.
Measures anthocyanins in black rice extract by HPLC and reports a total. Tell us which anthocyanins the total includes and the compound it is expressed as.
Measures anthocyanins in Delphinol ingredient material by HPLC. Tell us which anthocyanins your specification names.
Determines anthocyanins in Morosil ingredient material by UV/Vis, expressed as your specification states. The exact procedure is confirmed at quote.
A UV/Vis group result for tea polyphenols, expressed as ethyl gallate. It does not identify individual catechins; for catechins by chromatography, see the tea assays.
A UV/Vis group result for total polyphenols in Fitnox ingredient material, expressed as the reference compound your specification names.
Measures hydrolysable tannins in Capros ingredient material by UPLC. Tell us which compounds your specification names and whether it states each or a total.
Send the material sealed, labeled and protected from light and air.
Tell us the material, the plant part 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].
