POS Analytical Services has numerous years of experience developing and enhancing analytical assays. Methods are developed either based on the client’s specific needs or existing in-house and official methods are tailored to widen the scope or increase the number of quantifiable components. Utilizing our wide range of technical expertise and analytical equipment, POS is able to provide the client with reproducible, reliable assays.
In the past 18 months POS has added more than 30 new analytical methods to their existing capabilities. Three examples of recently developed methods are:
Phenolic Compounds Profile in Berries (HPLC) – $300.00/sample
Multiple health benefits associated with phenolic compounds have raised the interest in the contents of these plant metabolites in foods. This method quantifies hydroxybenzoic acids and derivatives, hydreoxycinnamic acids and derivatives, flavan-3-ols and proanthocyanidins, flavonol aglycones, anthocyanidins and anthocyanins in berries. Prior to this assay being developed, we were only able to assay for total polyphenols using a spectrophotometric method, with results reported as gallic acid or chlorogenic acid equivalents.
Essential Oils (GC/MS) $250.00
Essential oils are concentrated, distilled aromatic plant extracts. The analysis of an essential oil can help clients in their search for new interesting components, can determine the quantity of trace compounds and the quality of the essential oil, and can detect adulteration of true essential oils with cheaper oils. Two procedures for the analysis of essential oil compounds by GC/MS were developed. The first one is the headspace method, mainly for the major compounds analysis in an essential oil. The second one is the direct injection method, mainly for the profile of an unknown essential oil.
Astaxanthin (UV-Vis spectroscopy) – $60.00/sample
Astaxanthin is the carotenoid responsible for the reddish color in salmon, lobster, krill and other aquatic sources. This powerful antioxidant is currently sold as a nutritional supplement. Our clients asked for a simplified method to determine astaxanthin content. POS has a method to quantitatively determine astaxanthin as a component of the carotenoid profile assay (HPLC), but this method is more time-consuming and more costly ($220) than the spectrophotometric method we have recently developed in our labs.