Use of passive stir bar sorptive extraction as a simple integrative sampling technique of pesticides in freshwaters: Determination of sampling rates and lag-phases
| العنوان: | Use of passive stir bar sorptive extraction as a simple integrative sampling technique of pesticides in freshwaters: Determination of sampling rates and lag-phases |
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| المؤلفون: | Sophie Chataing, C. Guillemain, Christelle Margoum, Marina Coquery, Azziz Assoumani |
| المساهمون: | Milieux aquatiques, écologie et pollutions (UR MALY), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) |
| المصدر: | Journal of Chromatography A Journal of Chromatography A, Elsevier, 2014, 1333, p. 1-p. 8. ⟨10.1016/j.chroma.2014.01.063⟩ |
| بيانات النشر: | Elsevier BV, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | ECHANTILLONNAGE, Lag, Fresh Water, Agricultural pesticides, CAPTEUR PASSIF, Biochemistry, Analytical Chemistry, Fenitrothion, chemistry.chemical_compound, Tandem Mass Spectrometry, PESTICIDE, Pesticides, Chromatography, Chemistry, Organic Chemistry, Extraction (chemistry), Sampling (statistics), General Medicine, Pesticide, 6. Clean water, 13. Climate action, Environmental chemistry, [SDE]Environmental Sciences, Water Pollutants, Chemical, Chromatography, Liquid, Environmental Monitoring, Passive sampling, Bar (unit) |
| الوصف: | Passive sampling represents a cost-effective approach and is more representative than grab sampling for the determination of contaminant concentrations in freshwaters. In this study, we performed the calibration of a promising tool, the passive stir bar sorptive extraction (SBSE), which has previously shown good performances for semi-quantitative monitoring of pesticides in a field study. We determined the sampling rates and lag-phases of 18 moderately hydrophobic to hydrophobic agricultural pesticides (2.18log Kow5.11) from different chemical classes including triazines, substituted ureas, triazoles and organophosphate compounds. We also realised an elimination experiment to identify a performance reference compound (PRC). A flow-through calibration experiment was realised for 7 days at constant concentrations of target pesticides in tap water, under controlled temperature (20 °C) and flow velocity (2.5 cm s(-1)). Sampling rates were between 1.3 and 121 mL d(-1) with satisfactory RSD for most pesticides (9-47%), and poor repeatability for 3 hydrophobic pesticides (59-83%). Lag-phases for all target pesticides were shorter than 2 h, demonstrating the efficiency of passive SBSE for the integration of transient concentration peaks of these contaminants in surface waters. The role of flow velocity on pesticide uptakes was investigated and we assumed a water boundary layer-controlled mass transfer for 5 pesticides with log Kow3.3. Among these pesticides, we selected fenitrothion to evaluate its elimination, along with its deuterated analogue. Results showed 82% elimination of both compounds over the 7-day experiment and isotropic exchange for fenitrothion, making fenitrothion-d6 a promising PRC candidate for in situ applications. |
| تدمد: | 0021-9673 1873-3778 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4c3edca3a71dc1e62501a55e9db6696 https://doi.org/10.1016/j.chroma.2014.01.063 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....e4c3edca3a71dc1e62501a55e9db6696 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00219673 18733778 |
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