Optical analyzer
Abstract
An optical analyzer (10) wherein a sample (19) of particulate matter, and particularly of organic matter, which has been collected on a quartz fiber filter (20) is placed in a combustion tube (11), and light from a light source (14) is passed through the sample (19). The temperature of the sample (19) is raised at a controlled rate and in a controlled atmosphere. The magnitude of the transmission of light through the sample (19) is detected (18) as the temperature is raised. A data processor (23), differentiator (28) and a two pen recorder (24) provide a chart of the optical transmission versus temperature and the rate of change of optical transmission versus temperature signatures (T and D) of the sample (19). These signatures provide information as to physical and chemical processes and a variety of quantitative and qualitative information about the sample (19). Additional information is obtained by repeating the run in different atmospheres and/or different rates of heating with other samples of the same particulate material collected on other filters.
- Inventors:
-
- (Berkeley, CA)
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
- OSTI Identifier:
- 875225
- Patent Number(s):
- H572
- Assignee:
- United States of America as represented by United States (Washington, DC) LBNL
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- optical; analyzer; 10; sample; 19; particulate; matter; particularly; organic; collected; quartz; fiber; filter; 20; placed; combustion; tube; 11; light; source; 14; passed; temperature; raised; controlled; rate; atmosphere; magnitude; transmission; detected; 18; data; processor; 23; differentiator; 28; recorder; 24; provide; chart; versus; change; signatures; information; physical; chemical; processes; variety; quantitative; qualitative; additional; obtained; repeating; run; atmospheres; rates; heating; samples; material; filters; organic matter; controlled atmosphere; controlled rate; optical transmission; particulate matter; particulate material; light source; provide information; chemical process; versus temperature; combustion tube; quartz fiber; chemical processes; optical analyzer; data processor; fiber filter; additional information; /356/
Citation Formats
Hansen, Anthony D. Optical analyzer. United States: N. p., 1989.
Web.
Hansen, Anthony D. Optical analyzer. United States.
Hansen, Anthony D. Sun .
"Optical analyzer". United States. https://www.osti.gov/servlets/purl/875225.
@article{osti_875225,
title = {Optical analyzer},
author = {Hansen, Anthony D.},
abstractNote = {An optical analyzer (10) wherein a sample (19) of particulate matter, and particularly of organic matter, which has been collected on a quartz fiber filter (20) is placed in a combustion tube (11), and light from a light source (14) is passed through the sample (19). The temperature of the sample (19) is raised at a controlled rate and in a controlled atmosphere. The magnitude of the transmission of light through the sample (19) is detected (18) as the temperature is raised. A data processor (23), differentiator (28) and a two pen recorder (24) provide a chart of the optical transmission versus temperature and the rate of change of optical transmission versus temperature signatures (T and D) of the sample (19). These signatures provide information as to physical and chemical processes and a variety of quantitative and qualitative information about the sample (19). Additional information is obtained by repeating the run in different atmospheres and/or different rates of heating with other samples of the same particulate material collected on other filters.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}