| Main Title |
Investigation of particulate matter monitoring using contact electrification / |
| Author |
John, Walter,
|
| CORP Author |
California State Coll., Stanislaus, Turlock.;National Environmental Research Center, Research Triangle Park, N.C. Chemistry and Physics Lab. |
| Publisher |
The Office ; For sale through the National Technical Information Service, |
| Year Published |
1975 |
| Report Number |
EPA/650-2-75-043; EPA-802726; EPA-ROAP-26AAM |
| Stock Number |
PB-245 055 |
| OCLC Number |
04599157 |
| Subjects |
Aerosols ;
Electrostatics ;
Dust--Electric properties ;
Dust--Measurement
|
| Additional Subjects |
Monitors ;
Particles ;
Air pollution detection ;
Aerosols ;
Electrostatic charge ;
Gas sampling ;
Surfaces ;
Contact electricity
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 650-2-75-043 |
|
Headquarters Library/Washington,DC |
10/02/2014 |
| ELBD RPS |
EPA 650-2-74-043 |
repository copy |
AWBERC Library/Cincinnati,OH |
07/31/2017 |
| ELBD ARCHIVE |
EPA 650-2-75-043 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| NTIS |
PB-245 055 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vii, 46 pages : illustrations ; 27 cm. |
| Abstract |
The theory of the charging of aerosol particles by contact electricity is reviewed, as well as the development of monitors for particulate matter based on this principle. Data on the performance of these monitors is scarce and sometimes contradictory. In the present work, laboratory tests were carried out with a variety of test dusts. The results show that the dynamic response of the contact electricity monitor tracks well with that of an optical detector. The total charge correlates well with the gravimetric mass. Humidity or precharge on the particles did not influence the detector. Some evidence was obtained showing that particle size does not have an important effect on the response, although there is a cutoff for very small particles. Results for the sensitivity of the instrument can be grouped according to electrical resistivity of the material. It is found that the condition of the surface of the Inconel probe has a major effect on the sensitivity. Additional work is necessary on this aspect of the detector. The Theory of Cheng and Soo for the charging of metal particles is discussed. |
| Notes |
"EPA/650-2-75-043." "February 1975." Grant no. R-802726-01. Research sponsored by the California State College, Stanislaus, College Foundation. Includes bibliographical references (pages 38-40). |
