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13 results on '"Kozitsina, Alisa"'

7. Organophosphorous Pesticide Detection in Olive Oil by Using a Miniaturized, Easy-to-Use, and Cost-Effective Biosensor Combined with QuEChERS for Sample Clean-Up

Author

Fabiana Arduini, Matteo Forchielli, Viviana Scognamiglio, Kozitsina Alisa Nikolaevna, and Danila Moscone

Subjects
organophosphorous pesticides, electrochemical biosensor, butyrylcholinesterase, carbon black, screen-printed electrodes, QuEChERS, Chemical technology, TP1-1185
Abstract

Herein, we report a portable electrochemical biosensor based on butyrylcholinesterase (BChE) immobilized on carbon black (CB)-modified screen-printed electrodes (SPEs) for the detection of organophosphorous pesticides in olive oil. The BChE/CB-SPE biosensor was developed to detect paraoxon in standard solutions as well as in olive oil samples previously treated with the QuEChERS method to extract pesticides from the whole fatty matrix. The biosensor shows a linear concentration range of between 20 and 100 ppb for paraoxon both in standard solutions (phosphate buffer 0.05 M) and in olive oil extracts, with a detection limit of 6 ppb in olive oil extract, corresponding to 10% of inhibition. The accuracy of this biosensor in olive oil samples was assessed with olive oil spiked with paraoxon, obtaining satisfactory recovery values.

Published
2016
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10. A facile, metal-free, oxidative coupling of new 6-(hetero)aryl-[1,2,5]-oxadiazolo[3,4-b]pyrazines with pyrroles, indoles and carbazoles

Author

Kvashnin, Yuriy A., primary, Kazin, Nikita A., additional, Verbitskiy, Egor V., additional, Svalova, Tatyana S., additional, Ivanova, Alla V., additional, Kozitsina, Alisa N., additional, Slepukhin, Pavel A., additional, Rusinov, Gennady L., additional, Chupakhin, Oleg N., additional, and Charushin, Valery N., additional

Published
2016
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11. Organophosphorous Pesticide Detection in Olive Oil by Using a Miniaturized, Easy-to-Use, and Cost-Effective Biosensor Combined with QuEChERS for Sample Clean-Up

Author

Danila Moscone, Matteo Forchielli, Fabiana Arduini, Viviana Scognamiglio, and Kozitsina Alisa Nikolaevna

Subjects
QuEChERS, carbon black, Biosensing Techniques, 02 engineering and technology, Standard solution, lcsh:Chemical technology, Quechers, 01 natural sciences, Biochemistry, Article, Analytical Chemistry, screen-printed electrodes, organophosphorous pesticides, electrochemical biosensor, butyrylcholinesterase, Matrix (chemical analysis), Organophosphorus Compounds, olive oil analysis, Limit of Detection, Electrochemistry, medicine, Settore CHIM/01 - Chimica Analitica, lcsh:TP1-1185, Pesticides, Electrical and Electronic Engineering, Olive Oil, Instrumentation, Detection limit, Chromatography, Paraoxon, Chemistry, 010401 analytical chemistry, technology, industry, and agriculture, Pesticide, biosensors, 021001 nanoscience & nanotechnology, Organophosphorous Pesticide, Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Clean-up, 0210 nano-technology, Biosensor, medicine.drug
Abstract

Herein, we report a portable electrochemical biosensor based on butyrylcholinesterase (BChE) immobilized on carbon black (CB)-modified screen-printed electrodes (SPEs) for the detection of organophosphorous pesticides in olive oil. The BChE/CB-SPE biosensor was developed to detect paraoxon in standard solutions as well as in olive oil samples previously treated with the QuEChERS method to extract pesticides from the whole fatty matrix. The biosensor shows a linear concentration range of between 20 and 100 ppb for paraoxon both in standard solutions (phosphate buffer 0.05 M) and in olive oil extracts, with a detection limit of 6 ppb in olive oil extract, corresponding to 10% of inhibition. The accuracy of this biosensor in olive oil samples was assessed with olive oil spiked with paraoxon, obtaining satisfactory recovery values.

Published
2016

12. Organophosphorous Pesticide Detection in Olive Oil by Using a Miniaturized, Easy-to-Use, and Cost-Effective Biosensor Combined with QuEChERS for Sample Clean-Up.

Author

Arduini, Fabiana, Forchielli, Matteo, Scognamiglio, Viviana, Nikolaevna, Kozitsina Alisa, and Moscone, Danila

Subjects
ORGANOPHOSPHORUS pesticides, OLIVE oil, BIOSENSORS, BUTYRYLCHOLINESTERASE, CARBON-black, ELECTRODES
Abstract

Herein, we report a portable electrochemical biosensor based on butyrylcholinesterase (BChE) immobilized on carbon black (CB)-modified screen-printed electrodes (SPEs) for the detection of organophosphorous pesticides in olive oil. The BChE/CB-SPE biosensor was developed to detect paraoxon in standard solutions as well as in olive oil samples previously treated with the QuEChERS method to extract pesticides from the whole fatty matrix. The biosensor shows a linear concentration range of between 20 and 100 ppb for paraoxon both in standard solutions (phosphate buffer 0.05 M) and in olive oil extracts, with a detection limit of 6 ppb in olive oil extract, corresponding to 10% of inhibition. The accuracy of this biosensor in olive oil samples was assessed with olive oil spiked with paraoxon, obtaining satisfactory recovery values. [ABSTRACT FROM AUTHOR]

Published
2017
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13. Organophosphorous Pesticide Detection in Olive Oil by Using a Miniaturized, Easy-to-Use, and Cost-Effective Biosensor Combined with QuEChERS for Sample Clean-Up.

Author

Arduini F, Forchielli M, Scognamiglio V, Nikolaevna KA, and Moscone D

Subjects
Electrochemistry, Limit of Detection, Olive Oil analysis, Organophosphorus Compounds analysis, Biosensing Techniques methods, Olive Oil chemistry, Pesticides analysis
Abstract

Herein, we report a portable electrochemical biosensor based on butyrylcholinesterase (BChE) immobilized on carbon black (CB)-modified screen-printed electrodes (SPEs) for the detection of organophosphorous pesticides in olive oil. The BChE/CB-SPE biosensor was developed to detect paraoxon in standard solutions as well as in olive oil samples previously treated with the QuEChERS method to extract pesticides from the whole fatty matrix. The biosensor shows a linear concentration range of between 20 and 100 ppb for paraoxon both in standard solutions (phosphate buffer 0.05 M) and in olive oil extracts, with a detection limit of 6 ppb in olive oil extract, corresponding to 10% of inhibition. The accuracy of this biosensor in olive oil samples was assessed with olive oil spiked with paraoxon, obtaining satisfactory recovery values., Competing Interests: The authors declare no conflicts of interest.

Published
2016
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