Tangerine peel: botanical (fruit peel, flavonoid markers).
Tangerine peel testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
Marker compound: 2D structure drawn from the PubChem record (CID 10621).
Citrus reticulata Peel
hesperidin, narirutin, nobiletin, tangeretin
total or named markers, as your specification states
Botanical (fruit peel, flavonoid markers)
Marker compounds: hesperidin (CAS 520-26-3), narirutin (CAS 14259-46-2), nobiletin (CAS 478-01-3), tangeretin (CAS 481-53-8)
Method for the $250 identity, purity and quantity test: HPLC-UV marker-compound assay (hesperidin, narirutin and polymethoxylated flavones), LC-MS identity, against a reference standard, with results in 3 to 5 business days.
The USP Herbal Medicines Compendium monograph covers identity by HPTLC fingerprint and content of dihydroflavone glycosides (narirutin, hesperidin, didymin) and polymethoxylated flavones (nobiletin, heptamethoxyflavone, tangeretin) by HPLC. Full testing to the USP Herbal Medicines Compendium monograph for Citrus reticulata Peel is available and quoted.
$250
Chromatographic purity and mg per unit by the method matched to the compound, identity against a reference standard. 1 unit.
| Add-on test | Price |
|---|---|
| Identity and impurities | |
| FTIR identity | $90 |
| CHNS elemental analysis (carbon, hydrogen, nitrogen, sulfur) | $125 |
| Chiral purity (where a chiral method exists; new methods quoted) | $250 |
| Water, solvents and salt form | |
| Water content by Karl Fischer | $60 |
| Residual solvents | $150 |
| Counterions: chloride, acetate and TFA | $70 |
| Assay | |
| Assay, % w/w (with raw powder purity; $250 together) | +$50 |
| Metals and conformity | |
| Heavy metals: arsenic, cadmium, chromium, mercury and lead | $150 |
| Conformity: purity and quantity on more units from the same lot | $100 per extra unit |
10% off for 10 or more samples.
Need something else? Other tests are available on request.
Purity and quantity is $250 per sample (1 unit) and raw powder purity is $200 for 50 mg, with results in 3 to 5 business days. Send the material sealed and labeled, with the label claim and the form it contains.
No. The $250 test covers identity, purity and quantity by HPLC-UV measurement of hesperidin, narirutin and polymethoxylated flavones, with LC-MS identity. Full testing to the USP Herbal Medicines Compendium monograph for Citrus reticulata Peel is available and quoted.
USP has separate monographs for Citrus reticulata peel and pericarp, which differ in definition and markers. The label and the source of the material decide which one applies.
Aged tangerine peel loses volatile oil over time while the flavonoids are fairly stable. The polymethoxylated flavones nobiletin and tangeretin are measured in addition to hesperidin.
Peel of other Citrus species also contains hesperidin. The ratio of hesperidin, narirutin and the polymethoxylated flavones helps tell tangerine from other citrus peel.
https://pubchem.ncbi.nlm.nih.gov/compound/10621
Identity facts from the USP monograph header for this compound.
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