Glyphosate and AMPA passive sampling in freshwater using a microporous polyethylene diffusion sampler.
Identifieur interne : 004E21 ( Ncbi/Checkpoint ); précédent : 004E20; suivant : 004E22Glyphosate and AMPA passive sampling in freshwater using a microporous polyethylene diffusion sampler.
Auteurs : Vincent Fauvelle [France] ; Natalia Montero [Espagne] ; Jochen F. Mueller [Australie] ; Andrew Banks [Australie] ; Nicolas Mazzella [France] ; Sarit L. Kaserzon [Australie]Source :
- Chemosphere [ 1879-1298 ] ; 2017.
Abstract
Glyphosate (PMG) is one of the most widely used herbicides with a reported 8.6 million tons applied globally in 2016. Due to widespread use and limited understanding of long-term environmental impacts, it is expected that future monitoring requirements for PMG and its primary metabolite aminomethyl phosphonic acid (AMPA) in aquatic environments will increase, along with the need for low cost monitoring and risk assessment strategies. The aim of this study was to investigate a microporous polyethylene tube (MPT; 2-mm thickness, 17.6 cm(2) surface area, 35% porosity, 2.5 μm pore size) as a diffusive layer for the passive sampling of PMG and AMPA. Levels of PMG and AMPA sorbed to MPT were low (Kmw close to 1 mL g(-1)), validating MPT as a diffusive layer. Uptake experiments were conducted first under controlled laboratory conditions (pH = 6.8, 6 days), followed by an in situ freshwater lake system deployment (pH = 7.3, 11 days). PMG and AMPA accumulated linearly (slope relative standard deviation < 6%) under laboratory conditions with sampling rates (Rs) of 18 and 25 mL d(-1), respectively. PMG in situ Rs was 28 mL d(-1), and was not different from the one found in the laboratory. AMPA was below the limit of quantification (LOQ, 1 ng mL(-1)) in grab water samples, but was detected (>LOQ) in all passive samplers. Results illustrate the gain in sensitivity provided by the passive sampling technique, and the applicability of the device developed for the passive sampling of PMG and AMPA.
DOI: 10.1016/j.chemosphere.2017.08.013
PubMed: 28886558
Affiliations:
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Kaserzon</name><affiliation wicri:level="1"><nlm:affiliation>The Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 39 Kessels Road, Coopers Plains, QLD 4108, Australia. Electronic address: k.sarit@uq.edu.au.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>The Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 39 Kessels Road, Coopers Plains, QLD 4108</wicri:regionArea><wicri:noRegion>QLD 4108</wicri:noRegion></affiliation></author></analytic><series><title level="j">Chemosphere</title><idno type="eISSN">1879-1298</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Glyphosate (PMG) is one of the most widely used herbicides with a reported 8.6 million tons applied globally in 2016. Due to widespread use and limited understanding of long-term environmental impacts, it is expected that future monitoring requirements for PMG and its primary metabolite aminomethyl phosphonic acid (AMPA) in aquatic environments will increase, along with the need for low cost monitoring and risk assessment strategies. The aim of this study was to investigate a microporous polyethylene tube (MPT; 2-mm thickness, 17.6 cm(2) surface area, 35% porosity, 2.5 μm pore size) as a diffusive layer for the passive sampling of PMG and AMPA. Levels of PMG and AMPA sorbed to MPT were low (Kmw close to 1 mL g(-1)), validating MPT as a diffusive layer. Uptake experiments were conducted first under controlled laboratory conditions (pH = 6.8, 6 days), followed by an in situ freshwater lake system deployment (pH = 7.3, 11 days). PMG and AMPA accumulated linearly (slope relative standard deviation < 6%) under laboratory conditions with sampling rates (Rs) of 18 and 25 mL d(-1), respectively. PMG in situ Rs was 28 mL d(-1), and was not different from the one found in the laboratory. AMPA was below the limit of quantification (LOQ, 1 ng mL(-1)) in grab water samples, but was detected (>LOQ) in all passive samplers. Results illustrate the gain in sensitivity provided by the passive sampling technique, and the applicability of the device developed for the passive sampling of PMG and AMPA.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Espagne</li><li>France</li></country><region><li>Provence-Alpes-Côte d'Azur</li></region><settlement><li>Marseille</li></settlement></list><tree><country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Fauvelle, Vincent" sort="Fauvelle, Vincent" uniqKey="Fauvelle V" first="Vincent" last="Fauvelle">Vincent Fauvelle</name></region><name sortKey="Mazzella, Nicolas" sort="Mazzella, Nicolas" uniqKey="Mazzella N" first="Nicolas" last="Mazzella">Nicolas Mazzella</name></country><country name="Espagne"><noRegion><name sortKey="Montero, Natalia" sort="Montero, Natalia" uniqKey="Montero N" first="Natalia" last="Montero">Natalia Montero</name></noRegion></country><country name="Australie"><noRegion><name sortKey="Mueller, Jochen F" sort="Mueller, Jochen F" uniqKey="Mueller J" first="Jochen F" last="Mueller">Jochen F. 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