Bulletin 626-629
Bulletin 626-629
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The amount of methane in the 31 samples mentioned; that is, where no gas was used in the air current, varied from a trace to 0.1 per cent. In the sample containing 0.1 per cent (A-l, test 175), there was only a trace of carbon dioxide, no carbon monoxide, and 20.8 per cent oxygen. Though the amounts of distillate gases were small, their presence gave support to the idea of momentary predistillation. Succeeding samples in each case showed more extensive distillation, but such results wore eviden...tly due to the effects of combustion.
METHOD OF ANALYSIS.
By G. W. Jones.
The apparatus and methods used by the bureau for analysis of these gases are described in detail in Bulletin 42." At present the bureau uses a modified Orsat apparatus, differing from the one described in Bulletin 42 in that the hydrogen and carbon monoxide are determined by combustion with copper oxide M heated in an electric furnace. This method has been found to give more accurate results than the older one, which used an ammoniacal cuprous- chloride solution for determining carbon monoxide and a sodium picrate solution of colloidal palladium for determining hydrogen.
What to read after Bulletin 626-629?
You can find similar books in the "Read Also" column, or choose other free books by United States Bureau of Mines to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The amount of methane in the 31 samples mentioned; that is, where no gas was used in the air current, varied from a trace to 0.1 per cent. In the sample containing 0.1 per cent (A-l, test 175), there was only a trace of carbon dioxide, no carbon monoxide, and 20.8 per cent oxygen. Though the amounts of distillate gases were small, their presence gave support to the idea of momentary predistillation. Succeeding samples in each case showed more extensive distillation, but such results wore eviden...tly due to the effects of combustion.
METHOD OF ANALYSIS.
By G. W. Jones.
The apparatus and methods used by the bureau for analysis of these gases are described in detail in Bulletin 42." At present the bureau uses a modified Orsat apparatus, differing from the one described in Bulletin 42 in that the hydrogen and carbon monoxide are determined by combustion with copper oxide M heated in an electric furnace. This method has been found to give more accurate results than the older one, which used an ammoniacal cuprous- chloride solution for determining carbon monoxide and a sodium picrate solution of colloidal palladium for determining hydrogen.
What to read after Bulletin 626-629?
You can find similar books in the "Read Also" column, or choose other free books by United States Bureau of Mines to read onlineMoreLess
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