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Determination of pesticides in food samples by chromatographic and electrochemical techniques. A statistical comparison of performances.

Grant number: 13/01905-7
Support type:Scholarships in Brazil - Master
Effective date (Start): July 01, 2013
Effective date (End): December 31, 2015
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal researcher:Sergio Antonio Spinola Machado
Grantee:Érica Megumi Kataoka
Home Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated scholarship(s):14/15382-9 - Development of an amperometric biosensor based on acetylcholinesterase immobilized on graphene modified with gold nanoparticles for CARBENDAZIM pesticide detection, BE.EP.MS

Abstract

The determination of organophosphates and/or carbamates pesticides in food samples (cabbage, tomato, cucumber, potato, etc.) by two different analytical methods, electrochemical and chromatographic, is proposed. In the electrochemical method, it will be developed and characterized sensors based in carbon nanotubes decorated with gold nanoparticles to be used with square wave voltammetry, in order to maximize the analytical signal (peak currents) in function of pesticides concentrations, in buffer solution with pH approxiamtely 7. In the chromatographic method, the HPLC with UV-DAD detection will be used with the adequated variations, depending on the sample. If necessary, gas chromatography will be used instead. In this stage, several experimental parameters should be optimized. An extensive statistical treatment will be used to demonstrate reproducibility, roughness, sensitivity, selectivity, etc. of the proposed methodology.

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Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
KATAOKA, Érica Megumi. Carbendazim determination in orange juice samples by electrochemical techniques. A statistical evaluation of performance. 2016. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Química de São Carlos São Carlos.

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