Abstract
A method for the microdetermination of carbon and hydrogen is described. In this method a sample is burned in a stream of nitrogen by adding a suitable amount of oxygen generated electrolytically. In the combustion tube, a new absorbent for halogens and sulphur oxides, a combustion catalyst and a roll of reduced copper gauze are packed. Nitrogen oxides resulting from samples containing nitrogen are reduced to nitrogen by the copper gauze. About 50 successive determinations can be carried out with a copper gauze without renewing it. A new absorbent for halogens and sulphur oxides has an extremely high capacity compared with the usual absorbents such as silver wire, or silver granules, and it does not damage the combustion tube when it is exhausted. For the absorption tubes for water and carbon dioxide, the author's metal needle tubes are used, and the results obtained with various samples are found to be satisfactory.
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