The interactions of aldehydes, methyl ketones, methyl esters, sulfur compounds and alkylpyrazines with low density polyethylene (LDPE) were investigated. LDPE film, suspended on a stainless steel support, was immersed in simulated milk ultrafiltrate containing a flavor compound. After shaking the glass bottles containing the solutions and film samples for 24 hr at room temperature (24-+2"C), the flavor compound was extracted from both the LDPE samples and the SMUF, and quantitated using gas chromatography. The sorption was: aldehydes (C,-C,,) 11% to 63%, methyl ketones (+C,,) 1.5% to 43.0%, methyl esters (C&J 6.0% to 42-O%, and sulfur compounds 8.5% to 21%. Insignificant levels of alkylpyrazines were sorbed. For all flavor compound classes, as carbon chain length increased, the quantity of sorbed flavor compounds increased.
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