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The possibilities of quantitative dynamic headspace by use of a multiple extraction method and an internal gas standard system for various classes of organic compounds in polyethylene and polypropylene are demonstrated. Numerous compounds can be analyzed over wide ranges of concentration and vapor pressure. However, the present study shows that the precision of the desorption parameters is of critical importance for assuring good quantitative results. The possibilities of using a theoretical model are also described. The recovery may be determined and the use of repeated desorption cycles can be reduced.
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Hagman et al. (1988) studied this question.
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