8 BIBLIOGRAPHY OF ANALYTICAL CHEMISTRY OF MANGANESE 



1838: 2. Wackenroder, H. Neue Methode zur Scheidung des 

 Mangans vom Eisen, Nickel, Kobalt und Zink. 



Arch. Pharm., 66, 113; Pharm. Centrbl., 1838, 673 and 674; 1839, 

 193; Berzelius' Jsb. (1840), 19, 279; Jsb. chem., 1847, 975. 



Separation by means of sulphuretted hydrogen in acetic acid solu- 

 tion, and also by precipitation as sulphides and solution in dilute 

 hydrochloric acid. 



1839: I. FiKENTSCHER, F, C. Priifung der Braunsteinerze auf 

 Sauerstoff gehalt . 



J. prakt. Chem., 17, 173; Dingl. pol. J., 73, 204. 

 Determination of peroxide through loss of weight of strip of copper 

 inserted in the hydrochloric acid during solution of the ore. 



1839: 2. FucHS, J. N. Eisenerzprobe (und Braunsteinprobe) auf 

 nassem Wege. 



J. prakt. Chem., 17, 160; Pol. Centrbl., 1839, 665. 

 See Fikentscher, 1839: i. 



1839: 3. W. Trennung von Kobalt und Mangan. 



Ann. Chem. (Liebig), 29, 217; Pharm. Centrbl., 1839, 384; Ann. des 



Mines (3), 15, 431; Arch. Pharm., 74, 57. 

 Separation by means of silver nitrate and ammonia. 



1841: I. Berzelius. (Title unknown.) 



Berzelius' Jsb., 20, 189. 



Treatment with hydrofluoric acid to determine the state of oxidation 

 of manganese in its minerals. 



1841: 2. Henry. (Title unknown.) 



* Acad, de Med., 1839; Pharm. Centrbl., 1841, 923. 

 Determination in mineral waters. 



1841: 3. Liebig, J. Ueber Darstellung und Anwendung des Cyan- 

 kaliums. 



Ann. Chem. (Liebig), 41, 293. 



Separation from cobalt by means of cyanide. 



1841: 4. Ullgren. (Title unknown.) 



Berzelius' Jsb., 21, 147; Chem. Gaz., i, 13; Pharm. Centrbl., 1842, 

 254; Ann. Chem. (Liebig), 40, 266; Ann. des Mines (4), 2, 206. 

 Separation from nickel and cobalt by precipitation with potassium 

 hydroxide and hypochlorite, solution of the precipitate in hydro- 

 fluoric acid, and boiling with ammonia in excess. 



1842: I. Lea, H. C. Remarks upon the Examination of the Per- 

 oxide of Manganese. 

 Am. J. Sci. (i), 42, 81. 

 Tests to distinguish manganous from manganic salts. 



