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Abstract
A gas chromatographic method was developed for the determination of L-menthol in honey at levels as low as 0.1 ppm. The method includes steam distillation and hexane extraction with an internal standard (2,6-dimethylphenol). Beehives treated to control Acarapis woodi over 21 days with 30-60 g L-menthol contained L-menthol residues in honey and beeswax. L-Menthol was found only in treated portions of the hive and not later transferred to added honey supers. The highest levels of residues in honey (18 ppm) and beeswax (2790 ppm) were found when pure L-menthol was adsorbed into foam strips placed on top of the hives. L-Menthol residues in honey were not reduced by storage in open containers at room temperature for up to 55 days. Untrained panelists could not detect L-menthol in honey until the levels approached 36 ppm.
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