Chitosan-iron oxide nanocomposite based electrochemical aptasensor for determination of malathion

Prabhakar, Nirmal; Thakur, Himkusha; Bharti, Anu; Kaur, Navpreet

doi:10.1016/j.aca.2016.08.015

Cited by 89 publications

(21 citation statements)

References 43 publications

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“…From these results it was possible to observe that the developed platform presented a good performance for the electrochemical detection of the pesticide in terms of reproducibility, once the relative standard deviation (RSD) for a given electrode was 1.4%, which value increased to 2.0% when three identical electrodes were used. The developed electrochemical sensor presented similar or even better performance for detecting malathion compared to other results reported in the literature, as displayed in table 1 [7,[35][36][37].…”

Section: Electrochemical Detection Of Malathionsupporting

confidence: 64%

“…Among the pollutants, pesticides used in agriculture are considered hazardous chemicals if not properly used or managed [4][5][6]. Specifically, organophosphorus pesticides (OPs) are a group of organic pesticides that present high toxicity, and contribute with about 38% of the total pesticide used worldwide [7,8]. Such pesticides released in the natural environment can generate severe pollution problems, once they are not chemically specific and as a consequence, can affect several non-target species [9].…”

Section: Introductionmentioning

confidence: 99%

“…Such pesticides released in the natural environment can generate severe pollution problems, once they are not chemically specific and as a consequence, can affect several non-target species [9]. In addition, the OPs can be absorbed by the body in several ways and very rapidly, for example, through the skin, mucous membranes, lungs and the gastrointestinal tract [7,10,11]. The symptoms caused by contamination by malathion, one of the typicals OPs, can be headache, nausea, chest tightness, even convulsions, unconsciousness and can also act to suppress the immune system at relatively high doses [7].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

Migliorini

Sanfelice

Mercante

et al. 2019

Mater. Res. Express

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An electrochemical sensor based on polymeric electrospun nanofibers of polyamide 6 (PA6)/ polypyrrole (PPy) surface-modified with two forms of graphene was developed for the detection of malathion, an organophosphorus pesticide. The materials were chosen considering the electrospun nanofibers possess large surface area and porosity, while reduced graphene oxide has remarkable electrical conductivity, which is a good strategy to increase sensor sensitivity and improve the limit of detection towards the pesticide. The surface modification of nanofibers with graphene was carried out using chemically (CRGO) and electrochemically reduced graphene oxide (ERGO), in order to demonstrate how the degree of reduction of graphene oxide can influence its electrical conductivity. The influence of the reduction on the conductivity properties of graphene-based films was studied through electrochemical techniques: cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The platform modified with CRGO, which presented higher electrical conductivity compared to ERGO, was used in the electrochemical detection of the pesticide malathion and exhibited a low detection limit of 0.8 ng ml −1 (S/N=3). The results indicate that chemically reduced graphene oxide is a potential alternative for modifying electrodes surfaces designed for sensing distinct pollutants of environmental or agricultural interest.

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Section: Electrochemical Detection Of Malathionsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

Migliorini

Sanfelice

Mercante

et al. 2019

Mater. Res. Express

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“…SWV has also been used for detection of a wide range of OPs over nanocompositemodified GCE. Nanocomposites employed for electrochemical detection of OPs were parathion [24][25][26][27][28], malathion [29,30] and paraoxon [31,32]. The nanocomposites employed for modification of GCE for OPs detection were zeolite [24], ZrO 2 [25], Au/Graphene [26,27], ZrO 2 [28], SWNT/GO [29], MWCNT [30], Au/Pt [31] and ZrO 2 /MWCNT [32].…”

Section: Introductionmentioning

confidence: 99%

“…Nanocomposites employed for electrochemical detection of OPs were parathion [24][25][26][27][28], malathion [29,30] and paraoxon [31,32]. The nanocomposites employed for modification of GCE for OPs detection were zeolite [24], ZrO 2 [25], Au/Graphene [26,27], ZrO 2 [28], SWNT/GO [29], MWCNT [30], Au/Pt [31] and ZrO 2 /MWCNT [32]. The nanomaterials used for detection of CHL were graphene [17], MWCNT [33][34][35], with nano-TiO 2 [36], carbon nitride [37], ferrocene [38], CuO [39].…”

Section: Introductionmentioning

confidence: 99%

Development of polyindole/tungsten carbide nanocomposite-modified electrodes for electrochemical quantification of chlorpyrifos

et al. 2019

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The present investigation deals with the development of a novel polymer nanocomposite (PNCs) electrodes for simple, selective and sensitive detection of chlorpyrifos (CHL). PNCs were developed using surfactant facilitated polymerization of indole using different concentrations (wt%) of WC ranging 5-30. Formation of PNCs was ascertained through diversified analytical methods. Electrodes were derived from PNCs over stainless steel substrate for electrochemical quantification of CHL. With concentration of WC, the DC conductivity (10 −2 × S/cm) of electrodes was increased ranging 3.54-0.75 at 313 K. Electrochemical impedance spectroscopy reveals well stability of electrodes in phosphate buffer (PBS, 0.1 M) at pH 7.4. The performance of electrodes towards detection and quantification of CHL was investigated through square wave voltammetry. Study reveals that detection and quantification of CHL were dependent on concentration of WC in nanocomposites. Square wave voltammetry reveals that the electrode derived from PNCs with 5 wt% of WC has rendered highest limits of detection and quantification of CHL (10 −8 mol/L) up to 5.94 and 18. This work describes a viable method of preparation of synergistic blend of WC in PIN matrix having high electrical conductivity, rapid electron shift, huge surface area and enhanced stability for fast and précised electrochemical detection of CHL.

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Recent Advances in Chitosan‐Based Films for Novel Biosensor

Ahmad

Siddique

Setapar

et al. 2018

Electrically Conductive Polymer and Polymer Composites

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Chitosan-iron oxide nanocomposite based electrochemical aptasensor for determination of malathion

Cited by 89 publications

References 43 publications

Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

Electrochemical sensor based on polyamide 6/polypyrrole electrospun nanofibers coated with reduced graphene oxide for malathion pesticide detection

Development of polyindole/tungsten carbide nanocomposite-modified electrodes for electrochemical quantification of chlorpyrifos

Recent Advances in Chitosan‐Based Films for Novel Biosensor

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