114 BIBLIOGRAPHY OF ANALYTICAL CHEMISTRY OF MANGANESE 



(g) Filtration aided by addition of 

 a concentrated solution of 

 sodium acetate. 

 1888: 16 Schtirmann 

 (h) Destruction of organic matter 

 by means of barium peroxide 

 before titration with perman- 

 ganate. 

 1887: 4 Brand 

 1892: 12 V. Reis 

 (i) Determination of moisture in 

 the analysis of pyrolusite. 

 1855: 3 Fresenius 

 (j) Use of hydrofluoric acid to hold 

 silicic acid in solution. 

 1891: 19 Norris 

 1898: 6 Ford and Bregowsky 

 1900: 5 Ibbotson and Brear- 

 ley. 



QUANTITATIVE DETERMINA- 

 TION OF MANGANESE 

 PEROXIDE. 



I. By evolution of chlorine, and ab- 

 sorption in solutions of 



(a) alkaline hydroxides and deter- 



mination of the hypochlorite 



formed. 

 1829: I Gay-Lussac 

 1835: I Gay-Lussac 

 1844: I Ettling 

 1869: 10 Sherer and Rumpf 

 1870: 10 Sherer and Rumpf 

 1870: 12 Tissandier 

 1877: 16 Perrey 



(b) arsenious acid. 



1853: 10 Price 

 i860: 4 Machnea 



(c) ferrous sulphate. 



1831: 3 Turner 



1842: 4 Otto 



1867: I Braun 



1868: 3 Lunge 



1869: 8 Prior 



1885: 2 Charpentier 



(d) potassium iodide, and titration 



of iodine. 

 1853: I Btmsen 

 1853: 5 Krieger 



1861: 4 MoUer 

 1869: 10 Sherer and Rumpf 

 1870: I Fresenius 

 1870: 5 Pattinson 

 1870: 10 Sherer and Rumpf 

 1877: 15 Parreno 

 1877: 16 Perrey 

 1879: II Pickering 

 1 881: 13 Lunge 

 1888: 9 de Koninck and Le- 

 crenier 



(e) silver nitrate. 



1843: I Baumann 



(f) stannous chloride. 



1 851: 2 Miiller 



(g) sulphurous acid (precipitation of 



barium sulphate). 

 1832: 3 Duflos 

 1832: 4 Duflos 

 1837: 2 Ebelmen 

 1838: I Gieseler 

 1874: 5 Pouch et 

 II. By solution in presence of a re- 

 ducing agent. 



(a) antimonious chloride. 



1872: 5 Kessler 



(b) arsenious acid. 



1S98: 2 Bialobszcski 



(c) ferrous salts. 



1842; 2 Levol 



1847: 2 Levol 



I 851: 4 Schabus 



1856: 2 Schreiner 



1869: II Teschenmacher and 



Smith 

 1870: 5 Pattinson 

 1877: 10 Hannay 

 1880: II Lunge 

 1 881: 16 Terreil 

 1889: 4 Finkener 

 1889: 10 M'Kellar 



(d) formic acid (with absorption of 



carbon dioxide). 

 1833: I Gobel 



(e) oxalates (with absorption of 



carbon dioxide). 

 1843: 3 Fresenius and Will 

 1847: 6 De Vry 

 1 861: 2 Kolbe 



