Current sample preparation methodologies for analysis of emerging pollutants in different environmental matrices

Dimpe, K. Mogolodi; Nomngongo, Philiswa N.

doi:10.1016/j.trac.2016.05.023

Cited by 167 publications

(79 citation statements)

References 102 publications

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“…Currently, sample preparation is moving towards environmental friendly processes, which means miniaturization, automation and simplicity of the methods [7]. A large number of microextraction techniques have been demonstrated to be well-suited for simple and effective analysis of a broad range of compounds in different kinds of sample [8].…”

Section: Introductionmentioning

confidence: 99%

Applications of Fabric Phase Sorptive Extraction to the Determination of Micropollutants in Liquid Samples

et al. 2018

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Abstract:The occurrence of organic micropollutants (OMPs) in the environment is a global concern due to their potential ecological risks. Several studies have shown that some OMPs are widely detected in environmental matrices such as surface water and sewage. Wastewater treatment plants (WWTPs) have received international attention over past decades because they are considered the greatest source of aquatic environmental contamination by anthropogenic micropollutants. Intensive sampling and analysis have been globally made to improve understanding of the occurrence, behavior and fate of OMPs in WWTPs using different types of analytical approach. Recently, special awareness has been devoted to developing new effective strategies to extract the micropollutants of wastewater. In particular, microextraction protocols have gained popularity because of their simplicity, low cost and in-field application for environmental analysis. Among these, fabric phase sorptive extraction (FPSE) is reported as an excellent approach due to its properties, not only reducing the required time but also employing minor solvent volume. In this overview, we summarize the results obtained by the Research Group of Environmental Chemical Analysis of the University of Las Palmas de Gran Canaria (Spain) using this technique. Its aim is to show the potential of FPSE for the extraction of some micropollutants, such as personal care products (benzotriazole ultraviolet stabilizers (BUVSs)) and pharmaceuticals (steroid hormones and cytostatic compounds) in different liquid samples, prior to their determination by liquid chromatography.

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Section: Introductionmentioning

confidence: 99%

Applications of Fabric Phase Sorptive Extraction to the Determination of Micropollutants in Liquid Samples

et al. 2018

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“…Contaminants tend to accumulate in the environment, which eventually becomes a hazard to most living organisms [1]. Therefore, it is vital to determine the type of pollution and the concentration, such that appropriate actions can be made [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…This biocompatible AOBAE, which is synthesized from 1,3-butanediol diacrylate (1, and piperazine (PIP) is easy to prepare and without the need for any solvents [15]. Here we demonstrate a printed interdigital capacitive pH sensor that utilizes such pH sensitive AOBAE as a sensing material.…”

Section: Introductionmentioning

confidence: 99%

Broad-Range Hydrogel-Based pH Sensor with Capacitive Readout Manufactured on a Flexible Substrate

et al. 2018

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Environmental monitoring of land, water and air, is an area receiving greater attention because of human health and safety concerns. Monitoring the type of pollution and concentration levels is vital, so that appropriate contingency plans can be determined. To effectively monitor the environment, there is a need for new sensors and sensor systems that suits these type of measurements. However, the diversity of sensors suitable for low, battery powered-and large area sensor systems are limited. We have manufactured and characterized a flexible pH sensor using laser processing and blade coating techniques that is able to measure pH between 2.94 and 11.80. The sensor consists of an interdigital capacitance with a pH sensitive hydrogel coating. Thin sensors can reach 95% of their final value value within 3 min, and are stable after 4 min. Good repeatability was achieved in regard to cycling of the sensor with different pH and multiple measurements from dry state. We have also studied the relation between an interdigital capacitance penetration depth and hydrogels expansion. We believe that our passive sensor is suitable to be used in low power and large area sensor networks.

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“…Environmental monitoring remains a daunting challenge for environmental health practitioners and regulators with the continual entry of new chemical compounds into the ecosystem from various sources, which has resulted in coining of the term 'emerging pollutants' (Dimpe and Nomngongo, 2016), owing to the fact that these compounds have not traditionally been of major concern until recently. At the top of this list are the pharmaceuticals (Oliveira et al, 2015), since these are used widely for improving human health.…”

Section: Introductionmentioning

confidence: 99%

Development of a coupled dispersive liquid-liquid micro-extraction with supported liquid phase micro-extraction for triclosan determination in wastewater

Letseka

George

2018

WSA

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As attention is drawn towards the monitoring of the so-called emerging pollutants, some common household chemicals are not well researched. Household antimicrobials can also present wastewater treatment challenges if not taken cognisance of. Herein we report the application of a recently reported coupled dispersive liquid-liquid micro-extraction (DLLME) with supported liquid phase micro-extraction (LPME) for the extraction of triclosan from wastewater. A univariate approach was used to investigate various parameters amenable to DLLME while no attempt was made to optimise the LPME, achieving the following optimum conditions: 25 µL of a 1:1 toluene-chloroform mixture with 10% sodium chloride into 1 mL aqueous triclosan solutions and extraction time of 15 min achieving an enrichment efficiency 167 times the reference solution prepared with distilled water, good linearity (R 2 = 0.9946) with the estimated limit of detection at 0.013 µg/mL and good repeatability (%RSD ≤ 10). The method showed considerable ruggedness with a similar linearity (R 2 = 0.9957) and repeatability (%RSD < 10), with only the limit of detection being compromised (0.31 µg/mL) when applied to a wastewater sample using a matrix-matched standard addition approach. Although the GC-FID method detected triclosan in the wastewater sample, the results were negated by those from the GC-MS; as such it therefore could not be concluded with confidence whether the water contained any triclosan or not. However, the results demonstrated the potential of this method in determination of triclosan in water-based samples when the extraction was coupled to a more rugged system such as a GC-MS.

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Current sample preparation methodologies for analysis of emerging pollutants in different environmental matrices

Cited by 167 publications

References 102 publications

Applications of Fabric Phase Sorptive Extraction to the Determination of Micropollutants in Liquid Samples

Applications of Fabric Phase Sorptive Extraction to the Determination of Micropollutants in Liquid Samples

Broad-Range Hydrogel-Based pH Sensor with Capacitive Readout Manufactured on a Flexible Substrate

Development of a coupled dispersive liquid-liquid micro-extraction with supported liquid phase micro-extraction for triclosan determination in wastewater

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