Abstract
To identify the compounds in machine cutting-fluid emulsion that have an obnoxious odor, we separated volatile components from the emulsion using both steam distillation with a Nickerson-Likens apparatus and vacuum distillation. These components were analyzed by gas chromatography and gas chromatography-mass spectrometry using a fused silica capillary column coated with cross-linked 5% phenylmethyl silicone. 2, 6-Dimethyl-3-methoxypyrazine was detected. The main odorous compounds were dimethyl disulflde, dimethyl trisulfide, and 2-butene-l-thiol, the last compound being tentatively identified by its mass spectrum.
