Main Title |
Ambient air non-methane hydrocarbon monitor / |
Author |
Burch, Darrell, E.
|
CORP Author |
Ford Aerospace and Communications Corp., Newport Beach, CA. Aeronutronic Div.;Environmental Sciences Research Lab., Research Triangle Park, NC. |
Publisher |
U.S. Environmental Potection Agency, Health Effects Research Laboratory, |
Year Published |
1980 |
Report Number |
EPA/600/2-80/201; U-6624; EPA-68-02-2776 |
Stock Number |
PB81-120008 |
Subjects |
Hydrocarbons--Measurement ;
Air--Pollution--Measurement ;
Air pollution control industry--United States
|
Additional Subjects |
Air pollution ;
Monitors ;
Hydrocarbons ;
Concentration(Composition) ;
Sampling ;
Performance evaluation ;
Design criteria ;
Laboratory equipment ;
Water ;
Flame ionization detectors ;
Air pollution detection
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB81-120008 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
49 pages ; 28 cm |
Abstract |
A monitor has been developed with adequate sensitivity and accuracy to measure continuously the concentration of non-methane hydrocarbons (NMHC) in ambient air. The monitor consists of pump and manifold system along with two basic instruments, a methane monitor and a flame-ionization detector (FID). The methane monitor, which employs gas-filter correlation techniques, makes use of the infrared absorption characteristics of methane to measure its concentration. A slight interference in the measurement of methane by H2O vapor in the sample air is accounted for from the simultaneous measurement of the H2O concentration. The flame-ionization detector measures the concentration of the total hydrocarbons (THC), including methane. The concentration of non-methane hydrocarbons is found by subtracting the methane concentration from the THC concentration. The noise-equivalent concentrations (peak-to-peak) of the methane monitor and the FID are approximately 50 ppb and 5 ppb of carbon, respectively. The estimated uncertainty in the measurement of a typical low-level NMHC concentration is between 20 ppb and 50 ppb. Concentrations as high as approximately 70 ppm can be measured. |
Notes |
Caption title. "December 1980." "EPA-600/2-80-201." Microfiche. |
Place Published |
Research Triangle Park, NC : |
Corporate Au Added Ent |
Environmental Sciences Research Laboratory. ; Ford Aerospace and Communiations Corporation (Newport Beach, CA). |
PUB Date Free Form |
1981. |
NTIS Prices |
PC A03/MF A01 |
BIB Level |
m |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20020123162024 |
Language |
eng |
Origin |
NTIS |
Type |
MERGE |
OCLC Rec Leader |
01126cam 2200289Ka 45170 |