Organic Pollutants in Water. I. Optimization of Operational Parameters of he CLSA Technique

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Abstract
The closed-loop stripping analysis (CLSA) is a well established method for quantitative determination of volatile organic pollutants in water. However, little attention has been paid to the reduction of the analysis time for a better application in monitoring studies. To this end extraction efficiencies with respect to compound volatility, water temperature (30,35,45 and 55°C) and time (0.5 and 2 hrs) have been calculated for a series of 21 n-alkanes, alkylaromatics and chlorinated hydrocarbons. The stripping at 45°C during 0.5 hrs gave better performances than the conventional 35°C/2 hrs, thus representing suitable conditions for large survey studies. Some applications as well as the overcoming of background contamination are discussed in the paper.