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Bog, hæftet The American Journal of Pharmacy, Vol. 49 (Classic Reprint) af John M. Maisch

The American Journal of Pharmacy, Vol. 49 (Classic Reprint)

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Excerpt from The American Journal of Pharmacy, Vol. 49

The oils obtained by exhaustion with benzin and it subsequent evap oration are mixed with wax and fixed oils to some extent, which can easily be separated therefrom by dissolving in alcohol, in which the latter are insolu... Læs mere

Excerpt from The American Journal of Pharmacy, Vol. 49

The oils obtained by exhaustion with benzin and it subsequent evap oration are mixed w... Læs mere

Produktdetaljer:

Sprog:
Engelsk
ISBN-13:
9781334334207
Sideantal:
664
Udgivet:
01-11-2016
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Excerpt from The American Journal of Pharmacy, Vol. 49

The oils obtained by exhaustion with benzin and it subsequent evap oration are mixed with wax and fixed oils to some extent, which can easily be separated therefrom by dissolving in alcohol, in which the latter are insoluble, filtration of this solution, and either expulsion of the alcohol by evaporation at the moderate heat of a water-bath or, much safer and better, by mixing the filtered alcoholic solution with several times its bulk of water, when the essential oil will arise to the surface or subside beneath it, as its specific gravity may be.

The oils by this cold process have a beautiful aroma, superior to many of the distilled ones, and the easy manner of obtaining them may, without doubt, prove a valuable method for the pharmacist who cannot always procure in the market the oils he wants, and has no facilities for distilling them, besides giving him fair means to arrive at a quantitative estimate of the essential oil contained in an article under analysis.

The essential oil of parsley seed cannot thus be separately prepared by the aid of benzin, as it contains another peculiar oily substance, well known by the name of apiol, which is soluble both in it and also alcohol.

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Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com

This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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