On poisons in relation to medical jurisprudence and medicine . andthen apply the iodic and nitric acids to the dialyzed liquid. Meconic Acid.—This is a solid crystalline acid, seen commonly inscaly rectangular crystals of a pale reddish color. It is combined withmorphia in opium, of which, accordingto Mulder, it forms on an average six percent.; and it serves to render this alka-loid soluble in water and other —Many tests have been proposedfor meconic acid ; there is only one uponwhich any reliance can be placed, namely,the perchloride or persidphate of test produces,
On poisons in relation to medical jurisprudence and medicine . andthen apply the iodic and nitric acids to the dialyzed liquid. Meconic Acid.—This is a solid crystalline acid, seen commonly inscaly rectangular crystals of a pale reddish color. It is combined withmorphia in opium, of which, accordingto Mulder, it forms on an average six percent.; and it serves to render this alka-loid soluble in water and other —Many tests have been proposedfor meconic acid ; there is only one uponwhich any reliance can be placed, namely,the perchloride or persidphate of test produces, even in a diluted so-lution of meconic acid, a deep blood-redcolor ; and it is owing to the presence ofthis acid that a salt of iron strikes a redcolor in tincture and infusion of opium,as well as in all liquids containing tracesor meconate ol morphia, the effects of diameters, the iron-test with morphia being coun-teracted by the presence of meconic acid. The red color of the mecon-ate of iron is not destroyed by diluted sulphuric acid or by a solution. Crystals of meconic acid, magnified 558 DETECTION OF MORPHIA AND of corrosive sublimate. To a portion of the diluted suspected liquid,a persalt of iron should therefore be added. If this strikes a red colorwhich is not discharged by boiling with dilute sulphuric acid, it indi-cates the presence of meconic acid. In liquids containing tannic acid,e. g., tea or beer, the action of this test is obscured by the productionof tannate of iron. The dark color is removed by a few drops of di-luted sulphuric acid, and the red tint then appears. It is a remarkable fact that healthy saliva contains a substancewhich, like morphia, decomposes iodic acid (and produces a blue colorwith a solution of starch), while at the same time it gives a deep redcolor resembling that produced by a persalt of iron in meconic source of error in analysis was first brought to the knowledge ofthe profession by the evidence given at a trial in Edinb
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectpoisons, bookyear1875
