Separation of a binary mixture of pesticides in fruits using a flow-through optosensor

Llorent‐Martínez, Eulogio J.; Delgado-Blanca, I; Ruiz-Medina, A.; Ortega‐Barrales, P.

doi:10.1016/j.talanta.2013.06.007

Cited by 14 publications

(3 citation statements)

References 31 publications

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“…An interesting approach, that is sequential injection chromatography, described by the authors as a flow-through optosensor, was reported for the separation of binary mixture of pesticides. 441 In this SIA system with fluorimetric detection, the pesticides are separated on-line with use of an additional amount of solid support C18 silica gel in the flow-through cell of a spectrofluorimeter. Another sophisticated approach in the development of SIC systems was reported for simultaneous determination of ultratrace plutonium and neptunium in urine with accelerator MS detection.…”

Section: Hyphenation Of Flow Injection Methods With High-performance ...mentioning

confidence: 99%

Recent advances in flow injection analysis

Trojanowicz

Kołacińska

2016

Analyst

170

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A dynamic development of methodologies of analytical flow injection measurements during four decades since their invention has reinforced the solid position of flow analysis in the arsenal of techniques and instrumentation of contemporary chemical analysis. With the number of published scientific papers exceeding 20,000, and advanced instrumentation available for environmental, food, and pharmaceutical analysis, flow analysis is well established as an extremely vital field of modern flow chemistry, which is developed simultaneously with methods of chemical synthesis carried out under flow conditions. This review work is based on almost 300 original papers published mostly in the last decade, with special emphasis put on presenting novel achievements from the most recent 2-3 years in order to indicate current development trends of this methodology. Besides the evolution of the design of whole measuring systems, and including especially new applications of various detections methods, several aspects of implications of progress in nanotechnology, and miniaturization of measuring systems for application in different field of modern chemical analysis are also discussed.

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Section: Hyphenation Of Flow Injection Methods With High-performance ...mentioning

confidence: 99%

Recent advances in flow injection analysis

Trojanowicz

Kołacińska

2016

Analyst

170

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“…The development of specific methods of analysis for a mixture of little definite insecticides and/or fungicides is a new trend in residual assessment for food and environmental analysis 1 – 3 . The authors have been working consistently since early 2017 using this strategy starting with extensive studies concerning specific insecticide residues on cucumbers 4 , 5 .…”

Section: Introductionmentioning

confidence: 99%

Applying novel economic simple green sample preparation procedures on natural and industrial specimens for chromatographic determination of insecticidal residues

Hegazy

Mahmoud

Elsayed

et al. 2023

Sci Rep

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Spraying a tertiary blend of the insecticides (hexythiazox, imidacloprid, and thiamethoxam), on tomato fruits, is a routine in agriculture-attentive countries. A simple green sample preparation technique was developed and applied to the field samples. Specific HP-TLC and RP-HPLC methodologies are established to estimate the residual insecticides and applied to the prepared field specimens. In the planner chromatographic methodology, methanol:chloroform:glacial acetic acid:triethyl amine (8.5:1.5:0.2:0.1, v/v) is recommended as a mobile system. The other one is columnar chromatography; acetonitrile: water (20:80, v/v), pH 2.8, is recommended as a mobile system. The validation parameters were examined following the ICH rules. The means percentages and standard deviations of the accuracy of the HP-TLC method for the determined compounds were 99.66 ± 0.974, 99.41 ± 0.950, and 99.89 ± 0.983, correspondingly. The values were 99.24 ± 0.921, 99.69 ± 0.681, and 99.20 ± 0.692, correspondingly, when they were determined by the RP-HPLC method. The relative standard deviation percentages of the methods’ repeatability and intermediate precision ranged from 0.389 to 0.920. Both methods were highly specific having resolution factors of ≥ 1.78 and selectivity factors of ≥ 1.71. They were applied to the field samples perfectly.

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“…Many techniques, such as high-performance liquid chromatography (HPLC), , gas chromatography/mass spectrometry (GC/MS), electrochemical analysis, , immunochips, , and enzyme-linked immunosorbent assays (ELISAs) , have been developed for effective detection of pesticides in food and water in the past decades. Although these methods show high selectivity and adequate sensitivity and allow discrimination of pesticides, they are costly and/or rely upon sophisticated instruments and skilled manpower, making these approaches impractical for regular environments and food safety monitoring.…”

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confidence: 99%

Colorimetric Sensor Array for Detection and Identification of Organophosphorus and Carbamate Pesticides

2015

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Due to relatively low persistence and high effectiveness for insect and pest eradication, organophosphates (OPs) and carbamates are the two major classes of pesticides that broadly used in agriculture. Hence, the sensitive and selective detection of OPs and carbamates is highly significant. In this current study, a colorimetric sensor array comprising five inexpensive and commercially available thiocholine and H2O2 sensitive indicators for the simultaneous detection and identification of OPs and carbamates is developed. The sensing mechanism of this array is based on the irreversible inhibition capability of OPs and carbamates to the activity of acetylcholinesterase (AChE), preventing production of thiocholine and H2O2 from S-acetylthiocholine and acetylcholine and thus resulting in decreased or no color reactions to thiocholine and H2O2 sensitive indicators. Through recognition patterns and standard statistical methods (i.e., hierarchical clustering analysis and principal component analysis), the as-developed array demonstrates not only discrimination of OPs and carbamates from other kinds of pesticides but, more interestingly, identification of them exactly from each other. Moreover, this array is experimentally confirmed to have high selectivity and sensitivity, good anti-interference capability, and potential applications in real samples for OPs and carbamates.

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Separation of a binary mixture of pesticides in fruits using a flow-through optosensor

Cited by 14 publications

References 31 publications

Recent advances in flow injection analysis

Recent advances in flow injection analysis

Applying novel economic simple green sample preparation procedures on natural and industrial specimens for chromatographic determination of insecticidal residues

Colorimetric Sensor Array for Detection and Identification of Organophosphorus and Carbamate Pesticides

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