Essential Oils; Volatile Oils. Part 8
Description
This section is from the "Encyclopedia Of Practical Receipts And Processes" book, by William B. Dick. Also available from Amazon: Dick's encyclopedia of practical receipts and processes.
Essential Oils; Volatile Oils. Part 8
1486. To Test the Purity of Oil of Rue
1486. To Test the Purity of Oil of Rue. This oil is nearly always adulterated. When pure, it forms a clear solution with rectified spirit; Iodine dissolves in it slowly, without apparent reaction beyond a darkening and a slight increase in viscidity: It is unaffected by a solution of chromate of potassa; Nitric acid very slowly changes it into a greenish yellow liquid balsam.
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