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Books Books 1 - 10 of 14 on ... on ignition. If an excess of acetic acid has been used, this is cautiously removed....  
" ... 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... "
The Areas of the United States, the States, and the Territories - Page 109
by Henry Gannett - 1906 - 9 pages
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The Chemical News and Journal of Industrial Science; with which ..., Volume 83

Sir William Crookes - Chemistry - 1901
...hours if necessary. Almost invariably a small precipitate soon shows itself, which if fine-grained and non-adherent to the glass may be regarded as pure...re-precipitated. Its final weight, averaging perhaps one-half milligrm., is to be added to that of the lime already found, and subtracted as tricalcium phosphate...
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The Chemical News and Journal of Industrial Science; with which ..., Volume 78

Sir William Crookes - Chemistry - 1898
...re-solution and re-precipitation after ignition, and its weight, averaging one-half milligrm., is then added to that of the lime already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesium. This...
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Bulletin of the United States Geological Survey, Issues 142-148

Geology - 1896
...re-solution and reprecipitation after ignition, and its weight, averaging one-half milligram, is then added to that of the lime already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesium. This...
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Analyses of Rocks, with a Chapter on Analytical Methods ..., Volume 8, Issue 148

Frank Wigglesworth Clarke, William Francis Hillebrand - Rocks - 1897 - 306 pages
...re-solntiou and reprecipitation after ignition, and its weight, averaging one-half milligram, is then added to that of the lime already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate, in order to arrive at the true figure for magnesium. This...
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Survey of the Northwestern Boundary of the United ..., Volume 8, Issue 174

Marcus Baker - Northwest boundary of the United States - 1900 - 78 pages
...twelve hours if necessary. Almost invariably a small precipitate soon shows itself, which if finegrained and nonadherent to the glass may be regarded as pure...already found, and subtracted as tricalcium phosphate from that of the magnesium pyrophosphate in order to arrive at the true figure for magnesia. This separation,...
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Bulletin, Issues 303-308

Geology - 1907
...quite insoluble in acids. This residue contains no silica, but only the constituents of a magnesian phosphate, and it may be a peculiar metaphosphate....from that of the magnesium pyrophosphate, in order a A pink color o( varying intensity almost invariably becomes apparent as the mass approaches dryness,...
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Bulletin - United States Geological Survey, Issue 305; Issue 422

Geological Survey (U.S.) - Geology - 1910
...alkalinity, and then acetic acid, drop by drop, till the solution, which should measure 10 to 30 cm.0 and not be hot, clears. It now and then happens that...from that of the magnesium pyrophosphate, in order a A pink color of varying intensity almost invariably becomes apparent as the mass approaches dryness,...
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The analysis of silicate ad carbonate rocks

William Francis Hillebrand - Rocks - 1907 - 200 pages
...alkalinity, and then acetic acid, drop by drop, till the solution, which should measure 10 to 30 cm.o and not be hot, clears. It now and then happens that...from that of the magnesium pyrophosphate, in order a A pink color of varying intensity almost invariably becomes apparent as the mass approaches dryness,...
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Bulletin - United States Geological Survey, Issue 305; Issue 422

Geological Survey (U.S.) - Geology - 1910
...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...
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Results of Spirit Leveling in Illinois, 1896-1908, Inclusive

Altitudes - 1910 - 74 pages
...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...
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