| Main Title |
Comparison of methods for determination of nitrogen dioxide in ambient air / |
| Author |
Purdue, L. J. ;
Akland, G. G. ;
Tabor., E. C.
|
| Other Authors |
|
| CORP Author |
National Environmental Research Center, Research Triangle Park, N.C. Quality Assurance and Environmental Monitoring Lab. |
| Publisher |
U.S. Environmental Protection Agency, National Environmental Research Center, Office of Research and Development, |
| Year Published |
1975 |
| Report Number |
EPA/650-4-75-023; EPA-ROAP-22ACK |
| Stock Number |
PB245025 |
| OCLC Number |
52565063 |
| Subjects |
Air--Pollution--Measurement ;
Nitrogen oxides
|
| Additional Subjects |
Air pollution ;
Nitrogen dioxide ;
Gas analysis ;
Monitors ;
Chemiluminescence ;
Colorimetric analysis ;
Comparison ;
Automatic control ;
Experimental design ;
Ozone ;
Continuous sampling ;
Air pollution sampling
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 650-4-75-023 |
|
Headquarters Library/Washington,DC |
01/06/2015 |
| ELBD ARCHIVE |
EPA 650-4-75-023 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| NTIS |
PB-245 025 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
x, 85 pages : illustrations, charts ; 28 cm. |
| Abstract |
Four methods for the measurement of nitrogen dioxide in ambient air were studied concurrently to determine the intramethod and intermethod comparability of the data generated under a variety of carefully controlled conditions. Included were two automated continuous methods (chemiluminescence and colorimetric) and two manual methods (arsenite and TGS-ANSA). Simultaneous nitrogen dioxide measurements were made on a common air source using duplicate analyzers for each of the automated methods and quadruplicate samples for each of the manual methods. The study was conducted in three phases. Phase I measurements were made on ambient air to which extra NO2 was added in order to provide a wider range of concentrations. Phase II determined the effect of variable NO2 concentration fluctuations during a sampling period. Phase III was an investigation of suspected ozone interference with the automated continuous colorimetric method. The results of the study indicate that the four methods, when properly used, are capable of producing data that are in remarkably good agreement except in the case of the colorimetric method, which yields low results in the presence of high ozone concentrations. |
| Notes |
"June 1975." "ROAP No. 26ACK; Program Element No. 1HA326." "EPA/650-4-75-023." PB 245 025--NTIS. |
