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Herbal Products TestingWith a growing demand for herbal products in today's market there is an ongoing effort to identify the purity and potency of the active ingredients found in these products. Several new monographs have been added to the latest USP supplements for the testing of herbal raw materials. Among the routine physical tests performed by WCAS are loss on drying, water content, USP <561> and a variety of thin layer chromatography identification procedures. Some monographs require an assay to determine the content of their actives: e.g. hypericins found in St. John's Wort, alliin from garlic and flavonol glycosides as quercetin in Ginkgo. |
HypericinHypericin is determined using a spectrophotometric method utilizing the visible absorption characteristics of hypericin in methanol.
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QuercetinQuercetin is measured by HPLC. Results are usually expressed as total quercetin; however, the method does distinguish between quercetin and related compounds kaempferol and isorhamnetin. |
Quercetin - a bioflavonoid commonly
found in plants, especially in rinds and bark
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| Alliin is another chromatographic method using a characteristic wavelength of 337nm. Valerian has been used as a herbal substitute for Valium, a commonly prescribed sedative and sleep aid. The active content of valeric acid, found in this product, can also be determined by HPLC. | Currently our chromatography group is validating analyses for the content of ginsenosides present in American Ginseng (Panax) and Oriental Ginseng. As the herbal market continues to grow so will WCAS to help meet your marketing and manufacturing needs. |
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9240
Santa Fe Springs Rd |
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562.948.2225 Fax 562.948.5850 |
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