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Environmental concern is renewing interest in selective, waste-free extractions. A recent report demonstrated an improved extraction of phenobarbital by means of a specifically designed molecular receptor. In that work, the solvent was CHCl 3 . The current work is the first step in extending extractions based on molecular recognition to reusable solvents, namely plasticizers. Phenobartital...
A method and apparatus for performing an enzyme spot test without traditional instrumentation is disclosed. The method utilizes various reagents to allow the visual determination of the presence of an enzyme in a sample above a predetermined critical level. The enzyme reacts with the reagents producing a product according to a reaction which is timed by a chemical fuse. At the end of the reaction,...
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