BIBLIOGRAPHY OF ANALYTICAL CHEMISTRY OF MANGANESE 69 



Precipitation, after the addition of ferric salt, by means of sodium 

 hydroxide and a standard iodine solution; filtration, and deter- 

 mination of the iodine in a measured volume of the filtrate. 



1890: 17. Warren, H. N. A Brief Summary of Practical Manipula- 

 tion. 



Chem. News, 61, 63; Ztschr. anal. Chem., 30, 35; Jsb. Chem., 



1890, 2372. 

 Use of powdered glass to promote settling of the basic ferric-acetate 



precipitate. 



1890: 18. ZiEGLER, A. Ueber die analytische Bestimmung der wes- 

 entliclien Bestandtheile des metallischen Wolframs, Ferro- 

 Wolframs und Wolframstahles ; sowie des Ferrochroms und 

 Chromstahles, unter theilweiser Zugrundelegung neuer Auf- 

 schlussverfahren. 



Dingl. pol. J., 274, 517; 275, 91; Monit. scientif. (4), 4, 486; Jsb. 



Chem., 1890, 2455; Ztschr. anal. Chem., 30, 47. 

 Determination in tungsten alloys. 



1891: I. Behrens, H, Beitrage zur michrochemischen Analyse. 



Ztschr. anal. Chem., 30, 140. 



Detection by microchemical tests with oxalic acid, salt of phos- 

 phorus, and potassium chlorate. 



1891: 2. Blum, L. Zur Bestimmung des Mangans im Eisen und 

 Stahl. 



Ztschr. anal. Chem., 30, 210; Jsb. Chem., 1891, 2482; Chem. Cen- 

 trbl., 1891, a, 810; J. Chem. Soc. (Lond.), 61, 963; Chem. Ind., 

 14, 498; Berg- u. huttenm. Ztg., 50, 211; School Mines Quart., 

 12, 335; Chem. News, 63, 204. 



Comments on the Volhard method and the Riirup modification of 

 the same (1891: 26). 



1891: 3. Blum, L. Ueber eine neue Methode zur volumetrischen 

 Bestimmung des Mangans. 



Ztschr. anal. Chem., 30, 284; Jsb. Chem., 1891, 2480; J. Chem. 

 Soc. (Lond.), 61, 1293; J. Ii-on Steel Inst., 1891, b, 330; Chem. 

 Ztg., 15, 207, Rep.; Ber., 24, 841, Ref.; Techn.-chem. Jahrb., 

 14, 34; School Mines Quart., 12, 335; Berg- u. huttenm. Ztg., 

 50, 276; Si> 41; Eng. Min. J., 53, 88; J. Soc. Chem. Ind., 10, 

 798; Analyst, 16, 140; Chem.-techn. Rep., 31, c, 267. 



Titration with potassium ferrocyanide in the presence of ammo- 

 nium tartrate, ferric salts, ammonium chloride, and free am- 

 inonia. 



