Manual of chemical analysis as applied to the examination of medicinal chemicals : a guide for the determination of their identity and quality, and for the determination of their identity and quality, and for the detection of impurities and adulterations : for the use of pharmaceutists, physicians, druggists, and manufacturing chemists, and of pharmaceutical and medical students . Fig. Fig. 66. 220 MANUAL OF CHEMICAL ANALYSIS. grains of the iron, in a generating-flask, a (Fig. 65), to theaction of about one ounce, or a little more, of a mixture ofequal parts of concentrated hydrochloric a
Manual of chemical analysis as applied to the examination of medicinal chemicals : a guide for the determination of their identity and quality, and for the determination of their identity and quality, and for the detection of impurities and adulterations : for the use of pharmaceutists, physicians, druggists, and manufacturing chemists, and of pharmaceutical and medical students . Fig. Fig. 66. 220 MANUAL OF CHEMICAL ANALYSIS. grains of the iron, in a generating-flask, a (Fig. 65), to theaction of about one ounce, or a little more, of a mixture ofequal parts of concentrated hydrochloric acid and water, andby passing the evolved gas through a dilute solution of cad-mium sulphate in c, and through a dilute solution of argenticnitrate, contained in d. The acid is, little by little, added tothe iron, through the funnel-tube 5, so that the evolution of thegas and its passage through the fluids are slow. The solutionin c is prepared by adding to an aqueous solution of cadmiumsulphate (1:100) so much of ammonium hydrate as is re-quired to redissolve the precipitate, formed upon the first addi-tion of the alkaline hydrate. The occurrence of a yellow precipitate in the cadmium so-lution would indicate suljpliur^ and of a black one in the argen-tic solution, arsenic or phosphorus. In order to distinguisheither arsenic or phosphorus, or both, in the iron, the blackenedargentic
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Keywords: ., bookcentury1, bookdecade1870, booksubjectpharmaceuticalchemistry
