SUMMARY Acetic, propionic, butyric, isovaleric, n‐valeric, isocaproie, and n‐caproic acids were identified in hickory sawdust smoke by gas chromatography, and the relative amounts of each were determined. Formic acid could not be identified, because the flame ionization detector was not sensitive to this acid. A total of eight columns were evaluated, and three of these which gave best separation were used for identification by retention times as well as infrared spectrophotometry.
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Hamid et al. (1965) studied this question.