Determination of Water-and Fat-Soluble Vitamins in Gummies by Reversed-Phase Liquid Chromatography
Poster Mar 15, 2017
Changling Qiu & Douglas E. Raynie
Vitamins are essential substances for human health and growth. Storage, aging, and processing of foods may cause vitamin loss. There is a need to develop a fast and accurate analytical method for the determination of vitamins in foods.
The determination of vitamins in sugar-based matrix is usually a challenging task due to the complexity of the matrix and instability of vitamins. Gummies are sugar-based candies which are fortified with selected vitamins.
Until now, no method has been proposed for the determination of vitamins in gummies. In this work, the determination of six water-soluble vitamins and three fat-soluble vitamins is studied by reverse phase liquid chromatograph(RP-LC) with ultra-violet detector at different wavelengths, on a C-8 column using phosphate buffer and acetonitrile as mobile phase.
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Pyrolysis-GC/MS is an effective tool in introducing and analyzing polymers. But since the polymer must be broken down to volatile segments in order to be sent to the GC, identification by the Mass Spec does not look at the original polymer, but only the fragments. This poster will look at a unique library designed to work with the existing NIST library, however contains averaged spectra of pyrolyzed polymers so it can be used to directly identify the original polymer sample.READ MORE
Application of Solid Phase Micro Extraction (SPME) and On‐Fiber Derivatization to Detect Precursors of Biomolecules in the study of Proto‐metabolismPoster
In the studies of origins of life, plausible synthetic reaction pathways to form biological relevant molecules, or building blocks of proto‐bilayer lipids, protein, RNA, and DNA in the primitive environment have been investigated intensively.READ MORE
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Automated sample preparation reduces the costs per sample and minimizes sample handling errors. Usually expensive and highly specialized pipetting robots are used. However, most of these systems are not designed with a direct interface for LC-MS applications. In addition common pipetting systems are not optimized for smaller scale sample series. Here we present a new tool for liquid handling of whole blood samples and direct sample injection.READ MORE