G - Physics – 01 – N
Patent
G - Physics
01
N
73/92
G01N 31/00 (2006.01) G01N 31/12 (2006.01)
Patent
CA 1126050
ANALYTICAL METHOD AND APPARATUS FOR THE DETERMINATION OF TOTAL NITROGEN CONTENTS IN SAMPLES Abstract of the Disclosure The invention concerns an analytical method for the determination of total nitrogen contents in samples. The method comprises passing an inert gas stream containing substantially no nitrogen through a first reaction tube which is packed with a decomposition catalyst and oxi- dizing agent and maintained at a temperature of 700° to 1100°C, a condenser for condensing unnecessary components in the gaseous products from the first reaction tube, a second reaction tube which is packed with an oxidizing agent and a reducing agent and maintained at a tempera- ture of 400° to 800°C, a moisture-absorbing tube and a carbon dioxide gas-absorbing tube in that order, intro- ducing a liquid sample to be analyzed into the first reaction tube and directing nitrogen gas leaving the carbon dioxide gas-absorbing tube to a nitrogen gas analyzer to determine the nitrogen gas content. The invention also concerns an apparatus for carrying out such a method. By means of the invention, nitrogen gas can be determined safely, simply, rapidly and accurately at low cost.
352452
Kirby Eades Gale Baker
Sumitomo Chemical Co. Ltd.
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