Calibration of a passive sampler based on stir bar sorptive extraction for the monitoring of hydrophobic organic pollutants in water

Vrana, Branislav; Komancová, Lucie; Sobotka, Jaromír

doi:10.1016/j.talanta.2016.01.040

Cited by 20 publications

(7 citation statements)

References 31 publications

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“…We then used R s and K sw for all pesticides at the 2 flow velocities (n ¼ 48) to calculate more accurate d w values (d w 5 and d w 20 ) and D s values for 23 pesticides according to Equation 6. Predicted R s values were fitted simultaneously to the FIGURE 3: The uptake of chlorpyrifos-methyl (CPM) and linuron (LINU) and release of corresponding deuterated pesticides (CPM-d6 and LINU-d6) by silicone rubber rods at 5 cm s À1 .…”

Section: Application Of the Overall Resistance To Mass Transfer Modelmentioning

confidence: 99%

“…These passive samplers are available in a large variety of shapes: sheets, tubes, rods, or coated stir bars, for which the technique is termed passive stir bar sorptive extraction (SBSE) [4]. Modeling of contaminant uptake mechanisms in monophasic polymers, such as silicone rubber, is now well documented for passive sampling of hydrophobic contaminants (polycyclic aromatic hydrocarbons [PAHs] and polychlorinated biphenyls [PCBs]) [5][6][7][8][9][10][11]. Although silicone rubbers are strongly hydrophobic [12], they can extract organic compounds with a broad range of polarities (octanol/water partition coefficient [log K OW ] > 1-2) from water; however, only a few studies have focused on pesticides [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…The determination of R s requires a calibration experiment with a constant concentration of contaminants and controlled experimental parameters (constant temperature and adjustable flow velocity) [26]. For silicone rubbers, a few calibrations have been conducted for pesticides and polar pesticides in particular [6,14,17,27]. These calibration studies highlighted the need for an experimental design adapted to pesticide properties with short exposure monitoring (<15 d).…”

Section: Introductionmentioning

confidence: 99%

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Calibration of silicone rubber rods as passive samplers for pesticides at two different flow velocities: Modeling of sampling rates under water boundary layer and polymer control

Martín¹,

Margoum²,

Jolivet³

et al. 2018

Enviro Toxic and Chemistry

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There is a need to determine time-weighted average concentrations of polar contaminants such as pesticides by passive sampling in environmental waters. Calibration data for silicone rubber-based passive samplers are lacking for this class of compounds. The calibration data, sampling rate (R ), and partition coefficient between silicone rubber and water (K ) were precisely determined for 23 pesticides and 13 candidate performance reference compounds (PRCs) in a laboratory calibration system over 14 d for 2 water flow velocities, 5 and 20 cm s . The results showed that an in situ exposure duration of 7 d left a silicone rubber rod passive sampler configuration in the linear or curvilinear uptake period for 19 of the pesticides studied. A change in the transport mechanism from polymer control to water boundary layer control was observed for pesticides with a log K of approximately 3.3. The PRC candidates were not fully relevant to correct the impact of water flow velocity on R . We therefore propose an alternative method based on an overall resistance to mass transfer model to adjust R from laboratory experiments to in situ hydrodynamic conditions. We estimated diffusion coefficients (D ) and thickness of water boundary layer (δ ) as adjustable model parameters. Log D values ranged from -12.13 to -10.07 m s . The estimated δ value showed a power function correlation with water flow velocity. Environ Toxicol Chem 2018;37:1208-1218. © 2017 SETAC.

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Section: Application Of the Overall Resistance To Mass Transfer Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Calibration of silicone rubber rods as passive samplers for pesticides at two different flow velocities: Modeling of sampling rates under water boundary layer and polymer control

Martín¹,

Margoum²,

Jolivet³

et al. 2018

Enviro Toxic and Chemistry

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“…Promising approaches include passive sampling [27] and active large volume solid phase extraction (LVSPE) [28]. …”

Section: The Conceptual Frameworkmentioning

confidence: 99%

An expanded conceptual framework for solution-focused management of chemical pollution in European waters

et al. 2017

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BackgroundThis paper describes a conceptual framework for solutions-focused management of chemical contaminants built on novel and systematic approaches for identifying, quantifying and reducing risks of these substances.MethodsThe conceptual framework was developed in interaction with stakeholders representing relevant authorities and organisations responsible for managing environmental quality of water bodies. Stakeholder needs were compiled via a survey and dialogue. The content of the conceptual framework was thereafter developed with inputs from relevant scientific disciplines.ResultsThe conceptual framework consists of four access points: Chemicals, Environment, Abatement and Society, representing different aspects and approaches to engaging in the issue of chemical contamination of surface waters. It widens the scope for assessment and management of chemicals in comparison to a traditional (mostly) perchemical risk assessment approaches by including abatement- and societal approaches as optional solutions. The solution-focused approach implies an identification of abatement- and policy options upfront in the risk assessment process. The conceptual framework was designed for use in current and future chemical pollution assessments for the aquatic environment, including the specific challenges encountered in prioritising individual chemicals and mixtures, and is applicable for the development of approaches for safe chemical management in a broader sense. The four access points of the conceptual framework are interlinked by four key topics representing the main scientific challenges that need to be addressed, i.e.: identifying and prioritising hazardous chemicals at different scales; selecting relevant and efficient abatement options; providing regulatory support for chemicals management; predicting and prioritising future chemical risks. The conceptual framework aligns current challenges in the safe production and use of chemicals. The current state of knowledge and implementation of these challenges is described.ConclusionsThe use of the conceptual framework, and addressing the challenges, is intended to support: (1) forwarding sustainable use of chemicals, (2) identification of pollutants of priority concern for cost-effective management, (3) the selection of optimal abatement options and (4) the development and use of optimised legal and policy instruments.

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“…After the development of POCIS, there was a paradigm shift that showed the potential to assess various pharmaceutical, hormones and other organic contaminants 22 . Various PS are used depending on target contaminants, like POCIS (pharma or pesticide version), Empore Disk, Chemcatcher, Membrane enclosed silicon collector, Polyoxymethylene sheet, and many more 23 .…”

Section: Introductionmentioning

confidence: 99%

Pesticide Assessment Using Passive Samplers in Two River System of Cagayan De Oro River Basin, Philippines

Salingay¹,

Giesen²,

Zevenbergen³

2020

Preprint

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Monitoring organic pesticides in surface water using grab water sampling method is ineffective in most cases due to pesticides’ irregular emission and low solubility in water. To address the problem in water sampling method, this study used passive samplers (PS) composed of silicon rubber sheets (SR) and speedisk (SD). SR and SD were used respectively to measure hydrophobic and hydrophilic organic pesticides. These were submerged in river water uninterruptedly for 34 days. Pesticides in PS were extracted and analysed by sensitive analytical instruments HPLC, GC-MS MS and LC-MS MS. Pesticide assessment were conducted in two river systems in Cagayan de Oro River Basin, Philippines where agricultural run-off are unintentionally and continuously disposed from medium to huge plantations. The samplers were able to measure 105 emerging organic pollutants of which, 56 were organic pesticides and 22 organochlorine pesticides (OCP). Out of 56 pesticides, 11 were measured beyond the applied threshold level of 10ng/L. These were boscalid, carbendazim, dimethomorph, metalaxyl, propiconazole, pyrimethanil, diuron, monuron, simazine, dichlorvos and phenamiphos. The 22 OCP, despite being banned or restricted for almost two decades, were measured in ultra-traces of ng-pg/L. The data obtained in this study can be used to establish a baseline background level which is currently absent in most river systems in the Philippines. It is recommended that further study will be conducted using software PBPK or NORMTOX to assess health impacts and implications of the measured pesticides on the communities that are dependent, and continuously exposed to these constituents by these river waters.

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Calibration of a passive sampler based on stir bar sorptive extraction for the monitoring of hydrophobic organic pollutants in water

Cited by 20 publications

References 31 publications

Calibration of silicone rubber rods as passive samplers for pesticides at two different flow velocities: Modeling of sampling rates under water boundary layer and polymer control

Calibration of silicone rubber rods as passive samplers for pesticides at two different flow velocities: Modeling of sampling rates under water boundary layer and polymer control

An expanded conceptual framework for solution-focused management of chemical pollution in European waters

Pesticide Assessment Using Passive Samplers in Two River System of Cagayan De Oro River Basin, Philippines

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