Alkaloidal Estimation a Bibliographical Index of Chemical Research

Paul Ingold Murrill

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Allow the double filter to drain, then apply water to the crystals drop by drop, until they are practically free from mother-water, and afterwards wash them, drop by drop, from a pipette, with a saturated alcoholic solution of morphine. When this has passed through, displace the remaining alcohol by ether, using 10 c. C. Or more if necessary. Allow the filter to dry in a moderately warm place, at a temperature not exceeding 60, to constant weight, then carefully transfer the crystals to a weigh...ed watch-glass, and weigh. The weight found represents per- centage of morphine (crystallized) from tincture, multiplied by 10 gives percentage from crude opium, and multiplied by 25 percentage from extract.
1890. (22) NAGELVOORT, J. B. Rapid estimation of morphine in opium.
Am. J. Pharm. 1890, 407; Terapia moderna, 1891, 80; Rep. De Pharm. 1891, 283.
1891: (1) LAMBERT, A. Polariscopic estimation of morphine.
J. Pharm. Chim. (5) 3, 593; Jsb. D. Pharm. 1891, 550; J. Chern. Soc. 60, 1043; Chem. Centrbl.

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