Abstract
It is seriously necessary to remove the impurities such as oxygen and water vapor contained in the nitrogen stream used in the direct determination of organic oxygen by the method of Schütz-Unterzaucher.
The variation in blank values resulting from these impurities was investigated with the various temperatures of reduced copper provided for removal of oxygen and simultaneously with the different materials of connecting tube which should prevent the diffusion of atmospheric oxygen and moisture. It was concluded that the reduced copper maintained at 550° may eliminate the oxygen completely and further, the polyethylene connecting tube shows sufficient prevention of the permeation of atmospheric oxygen and moisture.
