Carbon nitrogen test system

Details Carbon nitrogen test system Carbon nitrogen test system

1976-02-26

1977-05-24

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

23253PC, G01N 708, G01N 2524, G01N 3110, G01N 3112

Patent

active

040253090

ABSTRACT:
An analytical method for determining the elemental carbon and nitrogen contents of a sample. The sample, as a liquid or in finely divided solid form is placed in an evacuable pressure vessel and is then oxidized with a cupric oxide oxidizing agent to convert carbon to CO.sub.2, nitrogen to N.sub.2, and hydrogen to water. After cooling to condense the water, the resulting pressure provides a measure of the total carbon plus nitrogen content of the original sample. An aliquot of the gas is then treated for CO.sub.2 removal, and the resulting change in volume thereby provides a measure of the ratio of carbon to nitrogen in the original sample.

REFERENCES:
patent: 2991684 (1961-07-01), Wever
patent: 3062624 (1962-11-01), Peifer
patent: 3226197 (1965-12-01), Lewis
patent: 3647387 (1972-03-01), Benson et al.
patent: 3652227 (1972-03-01), Harman et al.
patent: 3838969 (1974-10-01), Dugan
Fontyn et al., Homogeneous Chemiluminescent Measurement of Nitric Oxide with Ozone, Analyt. Chem. vol. 42, No. 65/70.

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