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Liquid desorption of organic solvents from industrial sludges

✍ Scribed by Luciano Ceccon; Alessandro Turello; Graziella Mocellin; Luigi Colugnati

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
763 KB
Volume
278
Category
Article
ISSN
0003-2670

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✦ Synopsis

Analysis of organic solvent residues in industrial sludges is usually based on preliminary extraction from the matrix, followed by gas chromatographic determination. Liquid desorption with carbon disulphide is one of the most frequently used methods of recovery. As a large number of variables can affect desorption efficiencies, recoveries from two wastes with different physico-chemical characteristics were evaluated. The loading of solvents affected the desorption efficiencies particularly of polar compounds: the recoveries increased with increased loading. The analyte composition played an important role: recoveries of polar solvents were generally higher in the presence of other polar compounds. The desorption efficiencies of almost all the solvents examined increased on decreasing the waste/desorbing agent ratio.

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