Calibration of a passive sampling device for time-integrated sampling of hydrophilic herbicides in aquatic environments

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Show simple item record Tran, ATK Hyne, RV Doble, P 2009-12-21T02:29:29Z 2007-03
dc.identifier.citation Environmental Toxicology and Chemistry, 2007, 26 (3), pp. 435 - 443
dc.identifier.issn 0730-7268
dc.identifier.other C1 en_US
dc.description.abstract Two types of solid-phase materials, a styrenedivinylbenzene copolymer sorbent (embedded in a SDB-XC Empore™ disk) and a styrenedivinylbenzene copolymer sorbent modified with sulfonic acid functional groups (embedded in a SDB-RPS Empore disk), were compared as a receiving phase in a passive sampling device for monitoring polar pesticides. The SDB-XC Empore disk was selected for further evaluation, overlayed with either a polysulfone or a polyethersulfone diffusion membrane. The target herbicides included five nonionized herbicides (simazine, atrazine, diuron, clomazone, and metolachlor) and four phenoxy acid herbicides (dicamba, (2,4-dichlorophenoxy)acetic acid [2,4-D], (4-chloro-2-methylphenoxy)acetic acid [MCPA], and triclopyr) with log octanol/water partition coefficient (log KOW) values of less than three in water. Uptake of these herbicides generally was higher into a device constructed of a SDB-XC Empore disk as a receiving phase covered with a polyethersulfone membrane compared to a similar device covered with a polysulfone membrane. Using the device with a SDB-XC Empore disk covered with a polyethersulfone membrane, linear uptake of simazine, atrazine, diuron, clomazone, and metolachlor was observed for up to 21 d, and daily sampling rates of the herbicides from water in a laboratory flow-through system were determined. The uptake rate of each nonionized herbicide by the Empore disk-based passive sampler was linearly proportional to its concentration in the water, and the sampling rate was independent of the water concentrations over the 21-d period. Uptake of the phenoxy acid herbicides (2,4-D, MCPA, and triclopyr) obeyed first-order kinetics and rapidly reached equilibrium in the passive sampler after approximately 12 d of exposure. The Empore disk-based passive sampler displayed isotropic kinetics, with a release half-life for triclopyr of approximately 6 d. © 2007 SETAC.
dc.language eng
dc.relation.isbasedon 10.1897/06-401R.1
dc.title Calibration of a passive sampling device for time-integrated sampling of hydrophilic herbicides in aquatic environments
dc.type Journal Article
dc.parent Environmental Toxicology and Chemistry
dc.journal.volume 3
dc.journal.volume 26
dc.journal.number 3 en_US
dc.publocation Europe en_US
dc.identifier.startpage 435 en_US
dc.identifier.endpage 443 en_US SCI.Chemistry and Forensic Sciences en_US
dc.conference Verified OK en_US
dc.for 0399 Other Chemical Sciences
dc.personcode 100467
dc.personcode 010494
dc.percentage 100 en_US Other Chemical Sciences en_US
dc.classification.type FOR-08 en_US
dc.location.activity ISI:000244241600007 en_US
dc.description.keywords Empore disk
dc.description.keywords Herbicides
dc.description.keywords Hydrophilic
dc.description.keywords Passive samplers
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Faculty of Science/School of Chemistry and Forensic Science
pubs.organisational-group /University of Technology Sydney/Strength - Forensic Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc true

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