Determination of pesticides in food samples by chromatographic and electrochemical techniques: a statistical comparison of performances

• Grant number: 13/01905-7
• Support Opportunities: Scholarships in Brazil - Master
• Start date: July 01, 2013
• End date: December 31, 2015
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Sergio Antonio Spinola Machado
• Grantee: Érica Megumi Kataoka
• Host 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. (AU)

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 (IQSC/BT) São Carlos.