ANALYTICAL METHOD AND APPARATUS FOR THE DETERMINATION OF TOTAL NITROGEN CONTENTS IN AQUEOUS SYSTEMS

摘要

The specification discloses an analytical method for the determination of the total nitrogen content in aqueous systems, which comprises passing an inert gas stream containing substantially no nitrogen and carbon dioxide through a reaction tube, which is packed with a decomposition catalyst and maintained at a temperatuare of 700 to 1200.degree.C, a condenser and a moisture-absorbing tube in that order, injecting an aqueous test sample to be analyzed into the reaction tube, and directing the gaseous products emerging out of the moisture-absorbing tube to a mass spectrometer to determine the nitrogen content. The specification also discloses an apparatus for carrying out the method. By this method, it is possible to determine the total nitrogen content in nitrogen compounds contained in aqueous systems, rapidly, accurately and with a high sensitivity.