Oxygen analyzer

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865934

Benner, William H ^[1]

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1. Danville, CA

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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4601882
• OSTI ID: 865934
• Country of Publication: United States
• Language: English

Related Subjects

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/