Electrochemical impedance spectroscopy determination of glyphosate using a molecularly imprinted chitosan

Zouaoui, Fares; Bourouına-Bacha, Saliha; Bourouina, Mustapha; Abroa-Nemeir, Imad; Halima, Hamdi Ben; Gallardo-González, Juan; Hassani, Nadia; Alcácer, Albert; Bausells, Joan; Jaffrezic‐Renault, Nicole; Zine, Nadia; Errachid, Abdelhamid

doi:10.1016/j.snb.2020.127753

Cited by 54 publications

(28 citation statements)

References 25 publications

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“…Figure 11 shows the electrodeposition voltammograms of chitosan on gold macroelectrodes at pH 5 [92]. A CV of the chitosan solution prepared in 0.1M acetic acid was carried out with a potential varying between -1.5 V and 0.5 V at a scan rate of 80 mV/s.…”

Section: A-electrodeposition By CVmentioning

confidence: 99%

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Electrochemical sensors based on molecularly imprinted chitosan: A review

Zouaoui

Bourouına-Bacha

Bourouina

et al. 2020

TrAC Trends in Analytical Chemistry

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Despite the enormous development of instruments for analyzing a wide variety of compounds, applied in different fields such as health, environment or quality control, the demand for increasingly sensitive and selective techniques continues to grow. In this regard, efforts have been made to highlight more appropriate techniques. Electrochemical sensors based on molecularly imprinted polymers (MIPs) offer an interesting alternative since they allow reaching high sensitivity and selectivity and they are inexpensive and easily adaptable to miniaturization. The choice of the functional monomer in the synthesis of MIPs is based on its capacity to provide complementary interactions with the target molecules. The various excellent properties of chitosan, as a biosourced polymer, make it a promising alternative to conventional functional monomers. This review reports on the principle of the MIPs technique describing the different possible approaches in their synthesis. It aims to provide an overview of the value of using chitosan as a functional monomer by highlighting its applications in electrochemical sensors.

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Section: A-electrodeposition By CVmentioning

confidence: 99%

“…The lowest detection limit recorded is 10 -21 M. The technique used was Square wave voltammetry (SWV) for the detection of bisphenol A [111]. Another, of 5.9x10 -18 M, has been described using electrochemical impedance spectroscopy, for the detection of glyphosate (EIS) [92].…”

Section: Iii7 Mips Electrochemical Sensors Based On Chitosanmentioning

confidence: 99%

Electrochemical sensors based on molecularly imprinted chitosan: A review

Zouaoui

Bourouına-Bacha

Bourouina

et al. 2020

TrAC Trends in Analytical Chemistry

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“…The sensitivity of the sensor based on CS-MIPs modified with CMA (CS-MIPs/CMA/Au) was compared with the sensitivity of the sensor based only on chitosan membrane (CS-MIPs/Au) (Zouaoui et al, 2020b ). As shown in Figure 6 , the sensitivity of CS-MIPs/CMA/Au is 2.37 times higher than CS-MIPs/Au.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Impedance Spectroscopy Microsensor Based on Molecularly Imprinted Chitosan Film Grafted on a 4-Aminophenylacetic Acid (CMA) Modified Gold Electrode, for the Sensitive Detection of Glyphosate

et al. 2021

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A novel electrochemical impedance spectroscopy (EIS) microsensor was implemented for the dosage of traces of glyphosate, in real and synthetic water samples. Molecularly imprinted chitosan was covalently immobilized on the surface of the microelectrode previously modified with 4-aminophenylacetic acid (CMA). The characterization of the resulting microelectrodes was carried out by using cyclic voltammetry measurement (CV), scanning electron microscopy (SEM), and electrochemical impedance spectrometry (EIS). EIS responses of the CS-MIPs/CMA/Au microsensor toward GLY was well-proportional to the concentration in the range from 0.31 × 10−9 to 50 × 10−6 mg/mL indicating a good correlation. The detection limit of GLY was 1 fg/mL (S/N = 3). Moreover, this microsensor showed good reproducibility and repeatability, high selectivity, and can be used for the detection of GLY in river water.

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“…Nowadays, even antibodies and enzyme conjugates in the enzyme-linked immunosorbent assay (ELISA) method could be replaced with imprinted polymers using new synthesis strategies like solid-phase synthesis of molecularly imprinted nanoparticles [ 15 , 16 , 17 , 18 , 19 ]. For glyphosate as a target molecule, different imprinted polymers were developed for direct detection (sensors) [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ] or sample-preparation [ 28 , 29 , 30 ] purposes. The fundamental principles of MIP-technology can be found in other published review manuscripts [ 13 , 14 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

“…Imprinting the polypyrrole for glyphosate by electropolymerization of pyrrole in the presence of glyphosate is another synthesis strategy which is reported by different authors [ 22 , 24 , 25 ]. Recently, Zouaoui et al developed an interesting synthesis strategy in which chitosan-glyphosate was electrodeposited at the surface of a gold microelectrode [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Rational Design of Molecularly Imprinted Polymers Using Quaternary Ammonium Cations for Glyphosate Detection

Zarejousheghani

Jaafar

Wollmerstaedt

et al. 2021

Sensors

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Molecularly imprinted polymers have emerged as cost-effective and rugged artificial selective sorbents for combination with different sensors. In this study, quaternary ammonium cations, as functional monomers, were systematically evaluated to design imprinted polymers for glyphosate as an important model compound for electrically charged and highly water-soluble chemical compounds. To this aim, a small pool of monomers were used including (3-acrylamidopropyl)trimethylammonium chloride, [2-(acryloyloxy)ethyl]trimethylammonium chloride, and diallyldimethylammonium chloride. The simultaneous interactions between three positively charged monomers and glyphosate were preliminary evaluated using statistical design of the experiment method. Afterwards, different polymers were synthesized at the gold surface of the quartz crystal microbalance sensor using optimized and not optimized glyphosate-monomers ratios. All synthesized polymers were characterized using atomic force microscopy, contact angle, Fourier-transform infrared, and X-ray photoelectron spectroscopy. Evaluated functional monomers showed promise as highly efficient functional monomers, when they are used together and at the optimized ratio, as predicted by the statistical method. Obtained results from the modified sensors were used to develop a simple model describing the binding characteristics at the surface of the different synthesized polymers. This model helps to develop new synthesis strategies for rational design of the highly selective imprinted polymers and to use as a sensing platform for water soluble and polar targets.

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Electrochemical impedance spectroscopy determination of glyphosate using a molecularly imprinted chitosan

Cited by 54 publications

References 25 publications

Electrochemical sensors based on molecularly imprinted chitosan: A review

Electrochemical sensors based on molecularly imprinted chitosan: A review

Electrochemical Impedance Spectroscopy Microsensor Based on Molecularly Imprinted Chitosan Film Grafted on a 4-Aminophenylacetic Acid (CMA) Modified Gold Electrode, for the Sensitive Detection of Glyphosate

Rational Design of Molecularly Imprinted Polymers Using Quaternary Ammonium Cations for Glyphosate Detection

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