Abstract
Residual organic compounds in laminated plastic material used in food packages have been identified through gas chromatographic and gas chromatographicmass spectrometric analyses of solid samples using a simple apparatus and direct headspace sampling of vapors from heated samples. Preliminary studies show to decomposition of components at evolution temperatures between 30 and 125°C. Although recovery of residual components was much less than 100% at all temperature, reproducibility based on peak areas was 19–53% relative standard deviation with 10–30 μg/g with no sample pretreatment. Various volatile organic compounds including methanol, 1-ethoxy-2-propanol, 1-propanol, 2-(2-hydroxypropoxy)-1-propanol, n-propyl acetate, 2-methyl-2-propanol, tert,-butanol and a C 9H 20 hydrocarbon were indentified in samples of laminated plastic material. Using a Tenax trap and the above technique these components were also detected in the vapor phase inside sealed bags made from the same material. Application of this technique to analysis of vapors in commercial potato chip packages revealed the presence of benzene as a major constituent.
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