Electrochemical Behaviour of Hexachlorocyclohexane

Martins, Paolla Carminatti; Medeiros, Maria José; Montenegro, M.I.

doi:10.4152/pea.199903319

Cited by 6 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At both electrodes, the voltammograms showed two distinct peaks in the region around −1.60 V and −0.80 V in the presence of 100 µM lindane (solid lines) while no significant peaks were observed in the absence of lindane (broken lines). The peak around −1.6 V is the significant signal which is also consistent with previous reports [ 11 , 12 , 14 , 15 , 17 , 18 ] regarding the reduction of lindane at various electrodes. This peak is attributed to the transformation of lindane to benzene through electrochemical reduction involving 6-electrons [ 24 ].…”

Section: Resultssupporting

confidence: 92%

“…The regulatory limit of pesticides in drinking water is 0.1 µg/L which corresponds to 0.34 nM [ 28 ]. This limit of detection is lower than electrochemical methods reported for lindane determination at cellulose acetate/GC [ 15 ], MnO 2 /GC [ 18 ], NiCo 2 O 4 /GC [ 17 ] and comparable with vitreous carbon [ 14 ], Nylon 6.6/MWCNT/Fe 3 O 4 [ 29 ] and CuO–MnO 2 /GC [ 19 ]. Moreover, this study is the first attempt to determine lindane in a completely aqueous medium.…”

Section: Resultsmentioning

confidence: 89%

“…Other electrochemical studies of lindane on modified and non-modified electrodes were available either in a completely organic media [ 11 , 12 , 13 , 14 ] or aqueous-organic mixtures [ 15 , 16 , 17 , 18 ] making them less attractive for direct environmental application. Moreover, the peak potential for the reduction of lindane was reported to occur at −1.45 V [ 18 ], −1.5 V [ 15 , 17 , 19 ] −1.94 V (vs. Ag/AgCl) [ 11 ], or −1.40 and −2.10 V [ 12 , 14 ], which is highly negative for selective determination due to interference problems from co-existing compounds. A study [ 16 ], on the reduction of lindane at silver cathodes in organic and aqueous-organic media showed a shift of the reduction peak to less negative potential with the addition of water from −1.40 V in 100% acetonitrile (ACN) to −0.89 V in 50:50 ACN-H 2 O.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rapid and Sensitive Quantification of the Pesticide Lindane by Polymer Modified Electrochemical Sensor

Noori¹,

Mortensen

Geto³

2021

Sensors

View full text Add to dashboard Cite

Lindane is documented by the Environmental Protection Agency (EPA) as one of the most toxic registered pesticides. Conventional detection of lindane in the environment requires manual field sampling and complex, time-consuming analytical sample handling relying on skilled labor. In this study, an electrochemical sensing system based on a modified electrode is reported. The system is capable of detecting lindane in aqueous medium in only 20 s. The surface of a conventional carbon electrode is modified with a film of conductive polymer that enables detection of lindane down to 30 nanomolar. The electrode modification procedure is simple and results in a robust sensor that can withstand intensive use. The sensitivity of the sensor is 7.18 µA/µM and the performance was demonstrated in the determination of lindane in spiked ground water. This suggests that the sensor is potentially capable of providing useful readings for decision makers. The rapid and sensitive quantification of lindane in aqueous medium is one step forward to new opportunities for direct, autonomous control of the pesticide level in the environment.

show abstract

Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rapid and Sensitive Quantification of the Pesticide Lindane by Polymer Modified Electrochemical Sensor

Noori¹,

Mortensen

Geto³

2021

Sensors

View full text Add to dashboard Cite

show abstract

“…A single well-dened diffusion controlled irreversible peak with a reduction potential of À2.1 V corresponding to 6e À was noticed. The detection limit reported in this work was 5 Â 10 À8 M. 17 An interesting paper dealing with the direct and indirect electroreduction of lindane using 9,10 diphenylanthracene (DPA) as a mediator on a vitreous carbon electrode in dimethylformamide (DMF) medium has been published by Derek Pletcher et al During mediated electron transfer high intensity light emission was observed due to the formation of DPA*. 18 A detailed account of the mechanistic pathways and characterization of the products formed during the electroreduction of lindane using electrochemically generated naphthalene radical on a glassy carbon electrode (GCE) in DMF medium has been described in the literature.…”

Section: Introductionmentioning

confidence: 56%

Development of an electroanalytical sensor for γ-hexachlorocyclohexane based on a cellulose acetate modified glassy carbon electrode

2013

View full text Add to dashboard Cite

A simple, reproducible, environmentally friendly cellulose acetate modified glassy carbon electrode was prepared and used for the direct reduction of lindane in aqueous alcoholic medium. This modified electrode offers a high sensing current with a lower reduction potential for lindane. The lowest adsorption of pesticide molecules was observed on the cellulose acetate modified electrode when compared with a bare glassy carbon electrode which enhances the sensitivity of the sensor. This modified electrode is highly stable with respect to time, so that the single electrode can be used for the multiple analysis of the lindane sample. Cyclic voltammetry, differential pulse voltammetry and amperometry were used as the sensing techniques. The reduction potential of lindane on this modified electrode is À1.5 V whereas the reduction potential of nitropesticides is around À0.600 V. This wide difference in reduction potential can be used to estimate lindane even in the presence of nitropesticides by cyclic voltammetry and differential pulse voltammetry. The analytical utility of the proposed method was checked with a commercial lindane lotion and drinking water samples. An amperometric instrument, interfaced with the cellulose acetate modified glassy carbon electrode was designed and tested for the sensing of lindane. The performance of this instrument was assessed.

show abstract

“…Electrochemical methods of analysis are not widely available for lindane due to its poor aqueous solubility and high negative reduction potential. However, some attempts have been reported to electrochemically reduce it in a completely organic [70][71][72][73][74] or mixtures of aqueous-organic [32,64,67,[75][76][77] media. Various electrode materials were employed for the reduction including bare and modified carbon [32,64,70,71,73,[75][76][77], silver [67], platinum [74], and copper [27].…”

Section: Electrochemical Detection Of Lindanementioning

confidence: 99%

Recent Development on the Electrochemical Detection of Selected Pesticides: A Focused Review

Noori¹,

Mortensen

Geto³

2020

Sensors

View full text Add to dashboard Cite

Pesticides are heavily used in agriculture to protect crops from diseases, insects, and weeds. However, only a fraction of the used pesticides reaches the target and the rest slips through the soil, causing the contamination of ground-and surface water resources. Given the emerging interest in the on-site detection of analytes that can replace traditional chromatographic techniques, alternative methods for pesticide measuring have recently encountered remarkable attention. This review gives a focused overview of the literature related to the electrochemical detection of selected pesticides. Here, we focus on the electrochemical detection of three important pesticides; glyphosate, lindane and bentazone using a variety of electrochemical detection techniques, electrode materials, electrolyte media, and sample matrix. The review summarizes the different electrochemical studies and provides an overview of the analytical performances reported such as; the limits of detection and linearity range. This article highlights the advancements in pesticide detection of the selected pesticides using electrochemical methods and point towards the challenges and needed efforts to achieve electrochemical detection suitable for on-site applications.

show abstract

Electrochemical Behaviour of Hexachlorocyclohexane

Cited by 6 publications

References 4 publications

Rapid and Sensitive Quantification of the Pesticide Lindane by Polymer Modified Electrochemical Sensor

Rapid and Sensitive Quantification of the Pesticide Lindane by Polymer Modified Electrochemical Sensor

Development of an electroanalytical sensor for γ-hexachlorocyclohexane based on a cellulose acetate modified glassy carbon electrode

Recent Development on the Electrochemical Detection of Selected Pesticides: A Focused Review

Contact Info

Product

Resources

About