Novel colorimetric assay for paraquat detection on-silica bead using negatively charged silver nanoparticles

Siangproh, Weena; Somboonsuk, Thachkorn; Chailapakul, O.; Songsrirote, Kriangsak

doi:10.1016/j.talanta.2017.06.045

Cited by 44 publications

(28 citation statements)

References 30 publications

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“…Cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS) were conducted using a CHI660e workstation (Chenhua, Shanghai, China) and a conventional three-electrode system in a solution containing 2.5 mmol L −1 Fe(CN) 6 3−/4consisting of 0.0824 g K 3 Fe(CN) 6 , 0.1164 g K 4 Fe(CN) 6 •3H 2 O, and 0.1 M KCl. A GCE (Ø3 mm) was used as the working electrode, a platinum wire was used as the auxiliary electrode, and a saturated calomel electrode was used as the reference electrode.…”

Section: Instrumentationmentioning

confidence: 99%

“…Although residual PQ can be degraded by microorganisms and photochemical processes, the slow degradation process and excessive use of PQ increase the risk of environmental contamination, posing a potential hazard to human and animal health [3][4][5]. Therefore, it has been banned in some countries [6]. However, due to low cost and high efficiency, PQ is unlikely to be replaced in the near future.…”

Section: Introductionmentioning

confidence: 99%

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A molecularly imprinted electrochemical sensor based on Au nanocross-chitosan composites for detection of paraquat

Shan

Habimana

et al. 2019

J Solid State Electrochem

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A novel electrochemical sensor for paraquat (PQ) detection based on molecularly imprinted polymer (MIP) membranes on a glassy carbon electrode (GCE) modified with Au nanocrosses-chitosan (AuNCs-CS) was constructed. P-Aminothiophenol (p-ATP) and 4,4′-bipyridine template were assembled on the surface of the modified GCE by the formation of Au-S bonds and hydrogen-bonding interactions, followed by polymer membrane formation by the electropolymerization in a polymer solution containing p-ATP, HAuCl 4 , tetrabutylammonium perchlorate (TBAP), and the template molecule 4,4′-bipyridine. The asconstructed molecularly imprinted sensor (MIP-AuNC-CS) was characterized by differential pulse voltammetry (DPV), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). This is the first time that molecularly imprinted polymer technology has been integrated with a modified AuNCs-CS to electrochemically detect PQ. The linear response of the MIP-AuNC-CS sensor was in the range from 1 × 10 −14 to 1 × 10 −10 mol L −1 , and the limit of detection was 2.3 × 10 −15 mol L −1 . This sensor showed high-speed real-time detection capability, low sample consumption, high sensitivity, low interference, and good stability characteristics, and was proven to detect PQ.

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Section: Instrumentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A molecularly imprinted electrochemical sensor based on Au nanocross-chitosan composites for detection of paraquat

Shan

Habimana

et al. 2019

J Solid State Electrochem

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“…Thus, contamination of PQ and GLY in water is a significant concern. 1–4 For drinking water, the US Environmental Protection Agency (US-EPA) has established maximum contaminant levels (MCLs) of 0.012 μM for PQ 5 and 4.140 μM for GLY. 6…”

Section: Introductionmentioning

confidence: 99%

“…Current methods to analyze PQ include immunoassay, 7 colorimetry, 1 and chromatographic methods including capillary electrophoresis (CE) 5 and high-performance liquid chromatography (HPLC) coupled with a diode array detector, 8 or in tandem with mass spectrometry. 9 To determine GLY, one can use any effective separation method, such as HPLC, 10 immunoassay, 11 or colorimetry.…”

Section: Introductionmentioning

confidence: 99%

Fast, sensitive and selective simultaneous determination of paraquat and glyphosate herbicides in water samples using a compact electrochemical sensor

et al. 2022

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“…Solid phase extraction (SPE), especially ion exchange sorbents, has been extensively used for extraction of quats [3,[19][20][21]. Many strategies, such as dispersive solid phase extraction (DSPE) [22,23] and headspace solid phase microextraction (HS-SPME) [24], have been used. Ion-pair SPE has been used as sample preparation for the determination of quaternary ammonium herbicides [12,13,25].…”

Section: Introductionmentioning

confidence: 99%

Supramolecular Solvent-Based Liquid Phase Microextraction Combined with Ion-Pairing Reversed-Phase HPLC for the Determination of Quats in Vegetable Samples

Hem¹,

Gissawong²,

Srijaranai³

et al. 2019

Toxics

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In this study, we used anion supramolecular solvent (SUPRAS) prepared from a mixture of an anionic surfactant, sodium dodecyl sulfate (SDS), and a cationic surfactant, tetrabutylammonium bromide (TBABr), as the extraction solvent in liquid phase microextraction (LPME) of paraquat (PQ) and diquat (DQ). The enriched PQ and DQ in the SUPRAS phase were simultaneously analyzed by ion-pairing reversed-phase high performance liquid chromatography. PQ and DQ were successfully extracted by LPME via electrostatic interaction between the positive charge of the quats and the negative charge of SUPRAS. PQ, DQ, and ethyl viologen (the internal standard) were separated within 15 min on a C18 column, with the mobile phase containing 1-dodecanesulfonic acid and triethylamine, via UV detection. The optimized conditions for the extraction of 10 mL aqueous solution are 50 μL of SUPRAS prepared from a mixture of SDS and TBABr at a mole ratio of 1:0.5, vortexed for 10 s at 1800 rpm, and centrifugation for 1 min at 3500 rpm. The obtained enrichment factors were 22 and 26 with limits of detection of 1.5 and 2.8 µg L−1 for DQ and PQ, respectively. The precision was good with relative standard deviations less than 3.86%. The proposed method was successfully applied for the determination of PQ and DQ in vegetable samples and recoveries were found in the range of 75.0% to 106.7%.

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Novel colorimetric assay for paraquat detection on-silica bead using negatively charged silver nanoparticles

Cited by 44 publications

References 30 publications

A molecularly imprinted electrochemical sensor based on Au nanocross-chitosan composites for detection of paraquat

A molecularly imprinted electrochemical sensor based on Au nanocross-chitosan composites for detection of paraquat

Fast, sensitive and selective simultaneous determination of paraquat and glyphosate herbicides in water samples using a compact electrochemical sensor

Supramolecular Solvent-Based Liquid Phase Microextraction Combined with Ion-Pairing Reversed-Phase HPLC for the Determination of Quats in Vegetable Samples

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