o e r rThe thermal decomposition of ferulic acid has been studied by thermal gravimetric analysis. The decomposition products were separated by gasliquid chromatography and identified by GLC retention time and infrared spectral comparison with authentic materials. Combined gas-liquid chromatography-mass spectrometry and thin-layer chromatography were used as supplementary tools in product analysis.Unsubstituted, 4-methyl-, 4-ethyl-, and 4-vinylguaiacols were identified as products from the decomposition of ferulic acid in air and nitrogen atmospheres. Vanillin, acetovanillone (4-hydroxy-3-methoxyacetophenone), and vanillic acid were formed only in the air atmosphere. A mechanism is proposed for a portion of the ferulic acid decomposition.ardwood smoke used to cure food products consists of a variety of compounds-carbonyls, acids,

Reactions of Nitrogen Dioxide and Organic Compounds in AirA mechanism is proposed for the transitory formation of ozone observed when pure nitrogen dioxide in oxygen is irradiated with artificial sunlight DuRING recent years, the growing

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The infrared absorptivity of gaseous ozone was determined for use In the analysis of polluted air. Absorption cells of various lengths were charged with ozone, which was measured by two physical methods. The absorp-

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