Abstract
Capillary manometers were used for the simultaneous determination of microgram quantities of nitrogen, oxygen, and hydrogen by the inert-gas fusion technique. The gases evolved from fusion of the sample are carried by helium, flrst through hot copper oxide for oxidation of H/sub 2/ to H/sub 2/O and CO to CO/sub 2/, then through capillary-manometer cold traps for the isolation and subsequent measurement of H/sub 2/O (at 110 deg C) and CO/sub 2/, and finally through activated charcoal at --196 deg C for the removal of N/sub 2/. The N/sub 2/ is transferred by Toepler pump to a capillary manometer for measurement. The time required for a complete analysis is about 25 minutes; less, if all three elements are not required. Sensitivity and precision are about the same as for the vacuum fusion method. (auth)
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