Oxygen analyzer
Abstract
An oxygen analyzer which identifies and classifies microgram quantities of oxygen in ambient particulate matter and for quantitating organic oxygen in solvent extracts of ambient particulate matter. A sample is pyrolyzed in oxygen-free nitrogen gas (N.sub.2), and the resulting oxygen quantitatively converted to carbon monoxide (CO) by contact with hot granular carbon (C). Two analysis modes are made possible: (1) rapid determination of total pyrolyzable oxygen obtained by decomposing the sample at 1135.degree. C., or (2) temperature-programmed oxygen thermal analysis obtained by heating the sample from room temperature to 1135.degree. C. as a function of time. The analyzer basically comprises a pyrolysis tube containing a bed of granular carbon under N.sub.2, ovens used to heat the carbon and/or decompose the sample, and a non-dispersive infrared CO detector coupled to a mini-computer to quantitate oxygen in the decomposition products and control oven heating.
- Inventors:
-
- Danville, CA
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- OSTI Identifier:
- 865934
- Patent Number(s):
- 4601882
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- oxygen; analyzer; identifies; classifies; microgram; quantities; ambient; particulate; matter; quantitating; organic; solvent; extracts; sample; pyrolyzed; oxygen-free; nitrogen; gas; resulting; quantitatively; converted; carbon; monoxide; contact; hot; granular; analysis; modes; rapid; determination; total; pyrolyzable; obtained; decomposing; 1135; degree; temperature-programmed; thermal; heating; temperature; function; time; basically; comprises; pyrolysis; tube; containing; bed; ovens; heat; decompose; non-dispersive; infrared; detector; coupled; mini-computer; quantitate; decomposition; products; control; oven; tube containing; nitrogen gas; decomposition products; particulate matter; carbon monoxide; basically comprises; rapid determination; oxygen analyzer; thermal analysis; solvent extract; ambient particulate; /422/436/
Citation Formats
Benner, William H. Oxygen analyzer. United States: N. p., 1986.
Web.
Benner, William H. Oxygen analyzer. United States.
Benner, William H. Wed .
"Oxygen analyzer". United States. https://www.osti.gov/servlets/purl/865934.
@article{osti_865934,
title = {Oxygen analyzer},
author = {Benner, William H},
abstractNote = {An oxygen analyzer which identifies and classifies microgram quantities of oxygen in ambient particulate matter and for quantitating organic oxygen in solvent extracts of ambient particulate matter. A sample is pyrolyzed in oxygen-free nitrogen gas (N.sub.2), and the resulting oxygen quantitatively converted to carbon monoxide (CO) by contact with hot granular carbon (C). Two analysis modes are made possible: (1) rapid determination of total pyrolyzable oxygen obtained by decomposing the sample at 1135.degree. C., or (2) temperature-programmed oxygen thermal analysis obtained by heating the sample from room temperature to 1135.degree. C. as a function of time. The analyzer basically comprises a pyrolysis tube containing a bed of granular carbon under N.sub.2, ovens used to heat the carbon and/or decompose the sample, and a non-dispersive infrared CO detector coupled to a mini-computer to quantitate oxygen in the decomposition products and control oven heating.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 01 00:00:00 EST 1986},
month = {Wed Jan 01 00:00:00 EST 1986}
}