Extractable organic compounds synthetic polymers

The handling and disposal problems associated with the use of liquid solvent extractors have resulted in increased attention to the separation and preconcentration of organic compounds in water by collection in synthetic polymers followed by elution with an organic solvent (2). For example, selective collection and concentration of organic bases on methylacrylic ester resin from dilute water samples have been reported (3). Such collection techniques are especially well-suited to flow-injection measurement techniques. In this study, ionizable organic analytes such as salicylic acid and 8-hydroxyquinoline (oxine) were extracted into a polymer and then back extracted by an aqueous solution. Amperometric measurement using a flow-injection technique was employed to monitor the process. 

Chitin, poly(p-(l - 4)-A-acetyl-D-glucosamine), is widely distributed in nature, is one of the most abundant organic compounds on Earth and is of great importance in different fields since it possesses unique structures and characteristics different from typical synthetic polymers. Chitin is obtained from lower animals, mainly extracted from crustaceans. The structure of chitin is similar to cellulose, with acetamide groups at the C2 positions in place of hydroxyl (Scheme 12.2). 

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