Method for the determination of total nitrogen including adding

Details Method for the determination of total nitrogen including adding Method for the determination of total nitrogen including adding

1991-01-14

1993-02-09

Hill, Jr., Robert J.

Chemistry: analytical and immunological testing

Nitrogen containing

Total nitrogen determined

436115, G01N 2176

Patent

active

051852683

ABSTRACT:
A method of determining nitrogen in various nitrogenous materials, wherein the materials are combusted by being brought into contact with a solid metallic catalytic mass, in the presence of an oxygenated gas, so as to convert the nitrogen into NO. This is then determined, preferably by chemiluminescence or by optical interferometry. The method is improved by adding a halide of an alkali metal or an alkaline earth metal to the materials prior to combustion.
An apparatus comprising an oven (1,2,2') charged with catalytic mass (4), which can be a wire acting as a heating element, and provided with an oxygen inlet (6). The catalytic mass is a non-oxidizable ferrous alloy or a metal of the Pt group.

REFERENCES:
patent: 3877875 (1975-04-01), Jones et al.
patent: 4018562 (1977-04-01), Parks et al.
patent: 4066402 (1978-01-01), Komiyama et al.
patent: 4066409 (1978-01-01), Fine
patent: 4333735 (1982-06-01), Hardy et al.

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