Verfahren und Vorrichtung zur Bestimmung des Gesamtstickstoffgehaltes mittels Elementaranalyse

摘要

The total nitrogen content of a sample is determined by means of a process that features the flash dynamic combustion of the sample, the subsequent reduction of the combustion gases by passage in He current through a Cu-containing reactor (4), the elimination of water from the reduced gases, the passage of the anhydrous gases through a gaschromatographic column (6) to separate nitrogen from possibly formed methane, the removal of carbon hydroxide on basic trap (5) before or after gaschromatographic separation, and the analysis of the gases coming from the basic trap in a thermal conductivity detector (8) kept at a temperature at least equal to that wich allows the full vaporization of water in the gases to be analyzed.