Abstract
The standard hydrazone method for the determination of camphor cannot be employed directly on a solution of camphor with phenol in a high percentage of mineral oil. When a large percentage of mineral oil is present, it adheres to the hydrazone crystals and interferes with the gravimetric analysis. A method is here presented which eliminates this difficulty. This method is based on the extraction of camphor with alcohol. A weighed sample is centrifuged after first being emulsified by the addition of 95% ethyl alcohol. This procedure gives recoveries averaging 99.6%.
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