CARBONATE OF IRON.
707
powder. Dry the mixture at a temperature not rauch above 120°.)—Dr. Becker,
of Mühlhausen, suggested this Compound. His idea was carried out by Klauer; 1and hence this preparation is known on the continent as Klauer's Ferrum Car-bonicum Saccharatum. The sugar checks, though it does not completely pre-vent, the rarther oxidation of the iron. This preparation is a greenish powder, 3composed of sesquioxide of iron, sugar, and carbonic acid, with some sesqui-oxide of iron. Its cha'ractcrs are, according to the Edinburgh College, as fol-lows:—
Colour grayish-green; easily solublc in muriatic acid, with brisk effervescence.
It may be given in doses of from üve to ten grains.
[This preparation is similar to the Pilulse Ferri Carbonatis of the U. S. Phar-macoposia. Valleys ferruginous puls. To make fchem, take Sulphate of Iron,giv.; Carbonate of Soda, 3v.; Clarified Honey, 3ijss.; Syrup, Boiling Water,each a sufficient quantity. Dissolve the Sulphate of Iron and Carbonate of Sodaeach in a pint of the Water, and to each Solution add a fluid ounce of syrup; thenmix the two Solutions in a bottle just large enough to contain them, close it accu-rately with a Stopper, and set it by that the Carbonate of Iron may subside. Pouroff the supernatant liquid, and having washed the precipitate with warm water,sweetened with syrup in the proportion of a fluid ounce of the latter to a pint ofthe former, until the washings no longer have a saline taste, place it upon a flan-nel cloth and express as much of the watei as possible; then immediately mix itwith the Honey. Lastly, heat the mixture, by means of a water bath, until itattains a pilular consistence. Dose the same.]
t IISTURA FERRI COMPOSITA, L. E. D. (U. S. ; ) Compound Mixture of Iron;Griffilk's Mixture. (Myrrh. powdered, 3ij.; Carbonate of Potash, 3j.; RoseWater, f gxviij.; Sulphate of Iron, powdered, 9ijss.; Spirit of Nutmeg, fgj.;Sugar, 3ij. Rub together the Myrrh with the Spirit of Nutmeg and the Car-bonate of Potash; and to these, while rubbing, add first the Rose Water withthe Sugar, then the Sulphate of Iron. Put the mixture immediately into a pro-per glass vessel, and stop it. L. The processes of the Edinburgh and DublinColleges are essentially the same.)—This is a professed imitation of Dr. Griffith'scelebrated antihectic or tonic mixture. 3
[The U. S. Pharmacopceia directs, Myrrh, a drachm; Carbonate of Potassa,twenty-five grains; Rose Water, seven fluid ounces and a half; Sulphate of Iron,in powder, a scruple; Spirit of Lavender, half a fluid ounce; Sugar, a drachm.Rub the Myrrh with the Rose Water gradually added, then mix with these theSpirit of Lavender, Sugar, and Carbonate of Potassa, and lastly, the Sulphate ofIron. Pour the mixture immediately into a glass bottle, which is to be wellstopped.]
In the preparation of it, double decomposition takes place: by the mutual re-action of carbonate of potash and sulphate of iron wo obtain sulphate of potash,which remains in Solution, and carbonate of protoxide of iron, which precipitates.To prevent the latter attracting more oxygen, it is to be preserved in a well-stoppered bottle. The quantity of carbonate of potash directed to be used isalmost twice as much as is required to decompose the quantity of sulphate ofiron ordered to be employed. The excess combines with the myrrh, and formsa kind of saponaceous Compound, which assists in suspending the carbonate ofiron in the liquid.
When first made, this mixture has a greenish colour, owing to the hydratedferruginous carbonate; but by exposure to the air it becomes reddish, owing tothe absorption of oxygen, by which sesquioxide of iron is formed, and carbonicacid evolves: hence it should only be prepared when required for use.
1 Pkarmaceutisckes Central-Blatt für 1836, S. 8 ; 27; also, Journ. de Pkarmacie, t. xxiii. p. 8G.s For soine observations on its Chemical properties see a paper by A. Baclmer ia the Pltarmaceutisehes Cen-tral-Blatt für 1837, S. 75.5.3 Pract. Observations on the Cure of Hectie and Slow Fevers, and tjie Pulmonary Consumplien. 1776,