| Main Title |
Final report : development of a formaldehyde analyzer for motor vehicle exhausts / |
| Author |
Johnston, Timothy H.
|
| Other Authors |
|
| Publisher |
Dynasciences Corp., |
| Year Published |
1971 |
| Report Number |
PB 210 266; EPA/APTD-0955; 171; CPA-70-170 |
| Stock Number |
PB-210 266 |
| OCLC Number |
50683844 |
| Subjects |
Motor vehicles--Pollution control devices ;
Automotive sensors ;
Formaldehyde--Measurement
|
| Additional Subjects |
( Aldehydes ;
Gas detectors) ;
( Air pollution ;
Gas detectors) ;
( Exhaust gases ;
Gas detectors) ;
Electrochemical cells ;
Formaldehyde ;
Quantitative analysis ;
Membranes ;
Electrodes ;
Design ;
Engineering drawings ;
Calibration ;
Microanalysis ;
Transducers ;
Diffusion ;
Air pollution detection ;
Automobile exhaust ;
Polymer gas permeability
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| ELBD ARCHIVE |
EPA APTD-0955 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ESAD |
EPA APTD 0955 |
|
Region 10 Library/Seattle,WA |
12/12/2017 |
| NTIS |
PB-210 266 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vi, 93 leaves : illustrations ; 28 cm |
| Abstract |
The purpose was to develop an electrochemical transducer which would selectively oxidize formaldehyde in the midst of all of the other gas species present in the exhaust stream of internal combustion engines. The current generated by this device would be amplified and displayed in a manner which would permit quantitative analysis of the formaldehyde concentration. The sensor which was developed was not as selective as proposed. However, its lack of selectivity applies only to members of the aldehyde family. It is equally sensitive to all aldehydes. The problem of evaluating the sensor's performance necessitated the completion of two other significant achievements: production of a reliable formaldehyde standard in the 1ppm concentration range; and development of a wet method of analysis which would give accurate yet fairly rapid measurements at this low level of pollutant. |
| Notes |
"August 30, 1971." "EPA/APTD-0955." "Report no.: 171." "Prepared for Department of Health, Education and Welfare, Durham, North Carolina." "Period covered: July 1, 1970 to June 30, 1971." "Contract number: CPA 70-170." Photocopy. |
