Sampling and analysis of airborne fenitrothion and Tris(2-Ethylhexyl)phosphate
ABSTRACT: An analytical technique is described for simultaneous determination of fenitrothion and tris(2-ethylhexyl)phosphate (TEHP) in air. Total airborne (vapor and aerosol) fenitrothion and TEHP were collected in glass tubes 75 by 6.3 mm outside diameter containing a 10-mm plug of Tenax GC. Air was drawn through the adsorber at a rate of about 1 L/min for a period of up to 4 h to measure the dosage of fenitrothion and TEHP or for 2 to 3 min to determine timewise variations of concentration. The break-through volume of the adsorbers was larger than 360 L at a sampling rate of 1 L/min. The material collected on Tenax GC was thermally released directly into a gas chromatographic column and analyzed using a thermionic detector. Cascade impactors were used to collect aerosol and measure the drop-size distribution over a range of 1 to 30 ..mu..m. The concentrations of fenitrothion and TEHP measured in field experiments varied over a range of 3 X 10/sup -12/ g/L to 2 X 10/sup -8/ g/L and 5 X 10/sup -12/ g/L to 2 X 10/sup -10/ g/L, respectively. The precision of the method was better than + or - 10 percent using different adsorbers and + or - 5 percent for the same adsorber. Field tests were conducted in New Brunswick forests during the 1980 spruce budworm control program.
- Research Organization:
- Unsteady Aerodynamics Laboratory, National Aeronautical Establishment, National Research Council of Canada, Ottawa, Ont.
- OSTI ID:
- 6530994
- Report Number(s):
- CONF-810849-
- Journal Information:
- Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Vol. STP-786; ISSN ASTTA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AEROSOLS
AIR POLLUTION MONITORING
AIR POLLUTION MONITORS
ALKENES
CANADA
CHEMICAL COMPOSITION
CHROMATOGRAPHY
COLLOIDS
DISPERSIONS
ECOLOGICAL CONCENTRATION
EQUIPMENT
ETHYLENE
FIELD TESTS
FLUIDS
GAS CHROMATOGRAPHY
GASES
HYDROCARBONS
MATERIALS
MEASURING INSTRUMENTS
MONITORING
MONITORS
NEW BRUNSWICK
NORTH AMERICA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SAMPLERS
SAMPLING
SEPARATION PROCESSES
SOLS
SORPTION
TESTING
TOXIC MATERIALS
VAPORS