A quantitative determination of organophosphate pesticides in organic solvents

Wilkins, Ebtisam; Carter, M; Voss, Jesse S.; Ivnitski, Dmitri

doi:10.1016/s1388-2481(00)00122-3

Cited by 45 publications

(33 citation statements)

References 28 publications

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“…The influence of acetonitrile, methanol and ethanol on ChE immobilised into polyvinyl alcohol functionalised with methyl pyridinium methyl sulfate (PVA-SbQ) has been reported showing an increase of the output current in 5% of acetonitrile and 10% in ethanol [159][160][161]. The influence of ethanol was investigated also by Wilkins et al using ChE immobilised by polyethylenimine and glutaraldehyde [162]. The biosensor constructed by SAM immobilisation was employed to diazinon and fenthion in acetone-saline phosphate buffer solution or ethanol-saline phosphate buffer solution with satisfactory results [163].…”

Section: Measurement Of Insecticides and Nerve Agents In Presence Of mentioning

confidence: 99%

Biosensors based on cholinesterase inhibition for insecticides, nerve agents and aflatoxin B1 detection (review)

et al. 2010

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The present review reports the research carried out during last 9 years on biosensors based on cholinesterase inhibition for nerve agents, organophosphorus and carbammic insecticides, and aflatoxin B 1 detection. Relative applications in environmental and food areas are also reported. Special attention is paid to the optimization of parameters such as enzyme immobilization, substrate concentration, and incubation time in the case of reversible inhibition by aflatoxin B 1 or irreversible inhibition by organophosphorus and carbamic insecticides, and nerve agents in order to optimize and improve the analytical performances of the biosensor. Evaluation of selectivity of the system is also discussed.

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Section: Measurement Of Insecticides and Nerve Agents In Presence Of mentioning

confidence: 99%

Biosensors based on cholinesterase inhibition for insecticides, nerve agents and aflatoxin B1 detection (review)

et al. 2010

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“…The maximum concentration of acetylthiocholine (ATCh) was again 2.4 mM. The percentage inhibition was then calculated using the formula (Albareda-Sirvent et al, 2001;Sotiropoulou and Chaniotakis, 2005;Wilkins et al, 2000):…”

Section: Inhibitory Studies Of Ache-based Biosensors In the Presence mentioning

confidence: 99%

Mercaptobenzothiazole-on-Gold Organic Phase Biosensor Systems: 4. Effect of Organic Solvents on Organophosphate and Carbamate Pesticide Determination

Somerset¹,

Baker²,

Iwuoha³

2011

Pesticides - Strategies for Pesticides Analysis

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“…Electrocatalytic oxidation of a series of organic thiols has been realized at a PB modified electrode, and used for the detection of these substances in liquid chromatography [9]. This ability of PB to catalyze electrooxidation of organic thiols has been later successively adopted for thiocholine and thus for pesticide detection, since thiocholine is a product of acetylcholinesterase catalyzed decomposition of acetylcholine [10,11]. Also, other substances of analytical interest have been shown to undergo electrocatalytic processes at PB and other metal hexacyanoferrate modified electrodes [3,4].…”

Section: Introductionmentioning

confidence: 99%

Rotating disk electrode study of electrocatalytic oxidation of ascorbate at Prussian blue modified electrode

Araminaitė¹,

Garjonytė²,

Malinauskas³

2009

Open Chemistry

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Electrooxidation of ascorbate has been studied with the use of a rotating disk electrode. The results obtained show an efficient electrocatalytic oxidation of ascorbate at the Prussian blue (PB) modified electrode to proceed in solutions of pH 5.5 and 7.3. Depending on solution pH, the onset potential for ascorbate electrooxidation at PB modified electrode appears shifted by 0.1-0.2 V to lower values, as compared to an unmodified glassy carbon electrode. Within the electrode potential window of 0.3 to 0.5 V vs. Ag/AgCl, and electrode rotation velocity of 50-2000 rpm, the catalytic current obeys Koutecky-Levich equation at a submillimolar ascorbate concentration. Kinetic current densities, obtained from the data treatment, are higher for a pH 5.5 solution, and also at higher electrode potential.

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A quantitative determination of organophosphate pesticides in organic solvents

Cited by 45 publications

References 28 publications

Biosensors based on cholinesterase inhibition for insecticides, nerve agents and aflatoxin B1 detection (review)

Biosensors based on cholinesterase inhibition for insecticides, nerve agents and aflatoxin B1 detection (review)

Mercaptobenzothiazole-on-Gold Organic Phase Biosensor Systems: 4. Effect of Organic Solvents on Organophosphate and Carbamate Pesticide Determination

Rotating disk electrode study of electrocatalytic oxidation of ascorbate at Prussian blue modified electrode

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