Optical analyzer
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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-76SF00098
- Assignee:
- The United States of America as represented by the United States Department of Energy (Washington, DC)
- Patent Number(s):
- H000572
- Application Number:
- 07/101534
- OSTI ID:
- 1176592
- Country of Publication:
- United States
- Language:
- English
The relationship between optical attenuation and black carbon concentration for ambient and source particles
|
journal | July 1984 |
Similar Records
Optical analyzer
Standard method of test for particulate matter in the atmosphere (optical density of filtered deposit). [Pollution and sampling]