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Title: 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:
 [1]
  1. Danville, CA
Issue Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
865934
Patent Number(s):
4601882
Assignee:
United States of America as represented by United States (Washington, DC)
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 = {1986},
month = {1}
}

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