Time variants in the assay of oil of peppermint**Presented before the Scientific Section, A. Ph. A., Minneapolis meeting, 1938.

The Assay for Menthol*

“…Nelson (4) states that the reagents used should be of the best quality and that the sodium acetate must be perfectly dry for best results. In 1939 Baldinger (5) carried out experiments on oil of peppermint, varying the time of both acetylation and saponification. The saponification time for most consistent results was found to be forty-five to sixty minutes.…”