 ... on ignition. If an excess of acetic acid has been used, this is cautiously removed by ammonia. Then a drop or two of solution of ammonium oxalate is added, and the small beaker is set aside for twelve hours if necessary. Almost invariably a small...  Bulletin - Seite 1031907Vollansicht - Über dieses Buch
 | William Francis Hillebrand - 1910 - 252 Seiten
...it may be filtered, ignited, and weighed as calcium oxide. Its weight, averaging less than 0.5 mg., is to be added to that of the lime already found and...from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesia. The alcoholic filtrate is to be evaporated, ignited to destroy... | |
 | David Butler Butler - 1913 - 594 Seiten
...visible. After an hour, filter, wash, and ignite to calcium oxide. Its weight, averaging perhaps 0-5 mg., is to be added to that of the lime already found,...from that of the magnesium pyrophosphate. . In order to determine approximately the iron and aluminum present the following procedure may be followed: —... | |
 | John Milton Nickles - 1919 - 586 Seiten
...it may be filtered, ignited, and weighed as calcium oxide. Its weight, averaging less than Oo mg., is to be added to that of the lime already found and...from that of the magnesium pyrophosphate, in order to arrive at a truer figure for magnesia. The alcoholic filtrate is to be evaporated, ignited to destroy... | |
 | 1919 - 304 Seiten
...it may be filtered, ignited, and weighed as calcium oxide. Its weight, averaging less than 0.5 mg., is to be added to that of the lime already found and...from that of the magnesium pyrophosphate, in order to arrive at a truer figure for magnesia. The alcoholic filtrate is to be evaporated, ignited to destroy... | |
 | 1912 - 726 Seiten
...visible. After an hour filter, wash, and ignite to calcium oxide. Its weight, averaging perhaps 0.5 mg is to be added to that of the lime already found and...from that of the magnesium pyrophosphate. In order to determine approximately the iron 'and aluminum present the following procedure may be followed:... | |
| |
