title: Duplicate sampling reproducibility of atmospheric residues of herbicides for paired pan and high-volume air samplers.
abstract: The reproducibility of collection of atmospheric residues of the herbicides 2,4-D and triallate as bulk (wet plus dry) deposition samples by paired pan samplers and as particulate (filter) and vapour (PUF/XAD-2 resin cartridge) samples by paired high-volume air samplers was determined. Variability of herbicide concentrations in paired bulk deposition samples was within 25% for 65 and 80% of the samples for 2,4-D and triallate, respectively, with approximately 90% of the paired samples being within a factor of 2 for both herbicides. The vapour samples of 2,4-D and triallate showed similar reproducibilities. The highest reproducibility was observed for the filter samples with 92% of the paired data sets for 2,4-D being within 25% variability. No triallate was detected in the filter samples.
authors.affiliation: Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB.
authors.forename: A J
authors.initials: AJ
authors.lastname: Cessna
authors.forename: D T
authors.initials: DT
authors.lastname: Waite
authors.forename: L A
authors.initials: LA
authors.lastname: Kerr
authors.forename: R
authors.initials: R
authors.lastname: Grover
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods; D005374:Filtration; D006540:Herbicides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis; D014214:Triallate / Q000032:analysis*
chemical_list: D006540:Herbicides; D010573:Pesticide Residues; D015084:2,4-Dichlorophenoxyacetic Acid; D014214:Triallate