Surface-emission monitoring for formaldehyde source-strength analysis
A passive surface-emission monitor has been developed for non-destructive measurement of formaldehyde (CH/sub 2/O) emission rates from CH/sub 2/O resin-containing materials such as urea-formaldehyde foam insulation (UFFI) and pressed-wood products. The monitor seals with the flat surface of a solid CH/sub 2/O emission source. The emitted CH/sub 2/O is sorbed by a planar distribution of solid sorbent (13X molecular sieve), supported at a fixed distance from the test medium. The CH/sub 2/O uptake of the exposed molecular sieve can be determined using a water-rinse desorption and colorimetric-analysis procedure. A detection limit of approximately 0.03 mg CH/sub 2/O/m/sup 2/h is achieved with a 20.3 cm diameter monitor using a three-hour collection period. Measurements of the CH/sub 2/O emission rate from pressed-wood products show strong correlations between the surface-emission monitor and environmentally controlled chamber tests. Formaldehyde emission-rate measurements of UFFI encased in simulated exterior wall panels also show strong correlations between the surface monitor and an air-flow monitoring technique.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6194802
- Report Number(s):
- CONF-830338-2; ON: DE83009787
- Resource Relation:
- Conference: APCA specialty meeting on measurement and monitering of non-criteria toxic contaminants, Chicago, IL, USA, 22 Mar 1983
- Country of Publication:
- United States
- Language:
- English
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