title: Evaluation of polyurethane foam as a trapping medium for herbicide vapor in air monitoring and worker inhalation studies.
abstract: Polyurethane foam was an efficient adsorbent for trapping vapors of butyl esters of 2,4-D (2,4-dichlorophenoxyacetic acid) and triallate (S-(2,3,3-trichloroallyl)diisopropylthiocarbamate) in high volume air monitoring studies and of butyl esters of 2,4-D, iso-octyl ester of 2,4-D, n-butyl ester of 2,4,5-T (2,4,5-trichlorophenoxyacetic acid), bromoxynil octanoate (2,5-dibromo-4-hydroxybenzonitrile), triallate, and trifluralin (alpha, alpha, alpha-trifluoro-2,6-dinitro-N-N-dipropyl-p-toluidine) in short-term, low volume, worker inhalation exposure studies. The collected herbicide vapor was readily desorbed under soxhlet extraction with n-hexane and subsequently analyzed with electron-capture GLC. The overall efficiencies, for both trapping and extraction, were over 90%, using a single plug, for all herbicides, except triallate. In the case of triallate, two plugs in series were required for efficient trapping under the high volume air monitoring situation.
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000031:analogs & derivatives / Q000032:analysis; D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D006540:Herbicides / Q000032:analysis*; D006801:Humans; D008452:Maximum Allowable Concentration; D011140:Polyurethanes; D012134:Respiratory Protective Devices; D014214:Triallate / Q000032:analysis
chemical_list: D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D006540:Herbicides; D011140:Polyurethanes; D015084:2,4-Dichlorophenoxyacetic Acid; C012267:2,4-D n-butyl ester; D014214:Triallate