Abstract
Naturally occurring 2-methylisoborneol, responsible for objectionable odor in some domestic water supplies, has been shown to exist in the enantiomeric form related to d-camphor. The synthesis by the action of methyllithium or methylmagnesium halides on d-camphor has been improved by the demonstration that the large amount of d-camphor in the crude product can be eliminated readily as the oxime. A method has been developed for the quantitation of 2-methylisoborneol in water down to the threshold-odor concentration of 0.1 μ/1. Camphor is added to the water as internal standard and the solution is extracted with 2% (v/v) of methylene chloride. The extract is concentrated to very small volume and analysed by gas chromatography using a flame ionization detector.
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