A single gas-liquid chromatographic column is described which will separate all the major fusel oil components rapidly and directly without prior concentration or extraction procedures. Quantitative data obtained using a 1:1 2% 1,2,6-hexanetrio 1:2% glycerol column compare favorably with those of the official AOAC colorimetric fusel oil method. Four additional components may be determined simultaneously and quantitatively.

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An infrared solution method for the determination of the propylene content of ethylene—propylene copolymers is described using carbon tetrachloride as a solvent and hydrogenated polyisoprene for calibration. Precision data are presented and the results are compared to those obtained by a newly developed nmr method.

The mass spectra are given of nonanoic, 2-ethylheptanoic, 2,5-diethylhexanedioic, 2-ethyloctanedioic, and decanedioic acids with the methyl esters of these acids. Quantitative methods are described for the analysis of nonanoic and 2-ethylheptanoic acid mixtures as well as mixtures of the respective methyl esters. Data are given for the precision and accuracy of the methods. By using a diazomethane esterification procedure, the C-9 monobasic and C-10 dibasic acids were quantitatively converted to their methyl esters.

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