Abstract

The examination of a number of reagents in an attempt to Und a. more convenient absorbent for nitrogen oxides, has revealed that manganese dioxide is very active. Granules of the reagent at room temperatures have been used successfully as an external absorbent for nitrogen oxides in the micro determination of carbon and hydrogen, using both the rapid and conventional combustion methods. A modified combustion tube packing has been developed in order to avoid retention of nitrogen dioxide in the water absorption tube when the conventional slow combustion method is used. In the rapid combustion method no special precautions were found to be necessary.

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