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" In case the volume of permanganate used is so small as to make doubtful the presence of vanadium, it is necessary to apply a qualitative test, which is best made as follows : — The solution is evaporated and heated to expel excess of sulphuric acid,... "
Chemical News and Journal of Industrial Science - Seite 184
1901
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The American Journal of Science, Bände 155-156

1898 - 1090 Seiten
...can be readily estimated. The phosphoric acid almost invariably present docs not affect the result. In case the volume of permanganate used is so small...qualitative test which is best made as follows : The solnfion is evaporated and heated to expel excess of sulphuric acid, the residue is taken up with two...
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Survey of the Northwestern Boundary of the United States, 1857-1861

Marcus Baker - 1900 - 350 Seiten
...to be made by reducing again by means of a current of sulphur dioxide gas, boiling this out again,2 and repeating the titration. The latter results are...excess of sulphuric acid, the residue is taken up with two or three cubic centimeters of water and a few drops of dilute nitric acid, and a couple of drops...
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Contributions to Chemistry and Mineralogy from the Laboratory of the United ...

Frank Wigglesworth Clarke - 1900 - 984 Seiten
...molybdenum by hydrogen aulphlde is much more rapid and satisfactory than from a hydrochloric notation. In case the volume of permanganate used is so small...sulphuric acid, the residue is taken up with 2 or 3 cubic centimeters of water and a drop or two of dilute nitric acid, and a couple of drops of hydrogen...
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Bulletin, Ausgaben 303-308

1907 - 874 Seiten
...240, 1887, p. 23; Zcitschr. anal. Chemie vol. 32, 1893, p. 2!5.) b. CONFIRMATORY QUALITATIVE TESTS. In case the volume of permanganate used is so small...sulphuric acid, the residue is taken up with 2 or 3 cm.3 of water and a few drops of dilute nitric acid, and a couple of drops of hydrogen peroxide are...
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Technical Methods of Ore Analysis

Albert Howard Low - 1905 - 316 Seiten
...heating a flask containing a solution of SO2 or a sulphite to which sulphuric acid has been added. 261. In case the volume of permanganate used is so small...follows : The solution is evaporated and heated to expel the excess of sulphuric acid, the residue is taken up with 2 or 3 cc. of water and a few drops of dilute...
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Technical Methods of Ore Analysis

Albert Howard Low - 1905 - 318 Seiten
...heating a flask containing a solution of SO2 or a sulphite to which sulphuric acid has been added. 261. In case the volume of permanganate used is so small...follows: The solution is evaporated and heated to expel the excess of sulphuric acid, the residue is taken up with 2 or 3 cc. of water and a few drops of dilute...
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The Areas of the United States, the States, and the ..., Ausgaben 302-307

Henry Gannett - 1906 - 644 Seiten
...240, 1887, p. 23; Xeitachr. anal. Chemle vol. 32, 1893, p. 225.') b. CONFIRMATORY QUALITATIVE TESTS. In case the volume of permanganate used is so small...sulphuric acid, the residue is taken up with 2 or 3 cm.3 of water and a few drops of dilute nitric acid, and a couple of drops of hydrogen peroxide are...
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Bulletin of the United States Geological Survey

Geological Survey (U.S.) - 1907 - 220 Seiten
...240, 1887, p. 23; Zeitschr. anal. Chemle vol. 32, 1893, p. 225.) b. CONFIRMATORY QUALITATIVE TESTS. In case the volume of permanganate used is so small...sulphuric acid, the residue is taken up with 2 or 3 cm.3 of water and a few drops of dilute nitric acid, and a couple of drops of hydrogen peroxide are...
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The Analysis of Silicate Ad Carbonate Rocks

William Francis Hillebrand - 1907 - 212 Seiten
...240, 1887, p. 23; Zcitschr. anal. Chemie vol. 32, 1893, p. 225.) b. CONFIRMATORY QUALITATIVE TESTS. In case the volume of permanganate used is so small...sulphuric acid, the residue is taken up with 2 or 3 cm.3 of water and a few drops of dilute nitric acid, and a couple of drops of hydrogen peroxide are...
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Results of Spirit Leveling in Illinois, 1896 to 1908, Inclusive

Samuel Stinson Gannett, David Henry Baldwin - 1910 - 490 Seiten
...little lower than the first and are to be taken as the correct ones b. CONFIRMATORY QUALITATIVE TESTS. In case the volume of permanganate used is so small...sulphuric acid, the residue is taken up with 2 or 3 cm.3 of water and a few drops of dilute nitric acid, and a couple of drops of hydrogen peroxide are...
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