ResourceSeparations
Esterification Experiment
7 Jan 2019Esters can be synthesized in a number of different ways. One common method is the acid catalyzed condensation of a carboxylic acid and an alcohol. The mechanism involves an initial protonation of the carboxylic acid to form a resonancestabilized cation. The addition of the alcohol to the cationic carbon and loss of one of the protons on the oxygen of the alcohol form a species called a geminal diol. Protonation of one of the hydroxyl groups in this diol, followed by loss of water, yields the ester product. To obtain significant yields of the product, the equilibrium must be shifted by either added excess of one of the starting materials or by removing water and/or the ester product.
Links
Tags
Solid-Phase ExtractionSolid-phase extraction (SPE) is used for clean-up, extraction and concentration of semi-volatile or non-volatile analytes from complex mixtures including blood, urine and food samples. Multiple formats are available for conducting SPE, including prepacked SPE cartridges, disks and microplates, as well as SPE sorbent powders for manual packing. SPE systems can be used to automate the process and extract multiple samples at once. Solid-phase microextraction (SPME) and supported liquid extraction (SLE) products are also available in the same formats. Find the best SPE, SLE and SPME equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Organic CompoundsOrganic compounds are carbon-based molecules that form the building blocks of life. These include hydrocarbons, lipids, proteins, and nucleic acids. Understanding organic compounds is crucial in chemistry, biochemistry, and pharmacology. Explore organic compound analysis tools in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.