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Design of advanced flow systems with zone merging and zone trapping hyphenated to dynamic leaching tests for the determination of triazine herbicides in samples of agronomical relevance

Grant number: 14/09842-7
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): October 01, 2014
Effective date (End): May 10, 2015
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal Investigator:Elias Ayres Guidetti Zagatto
Grantee:Ana Clara Felix Vida
Supervisor: Manuel Miró
Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Research place: Universitat de les Illes Balears (UIB), Spain  
Associated to the scholarship:11/08011-6 - Novel approaches for exploiting relatively slow chemical reactions in flow analysis. Applications to samples of environmental and agronomical relevance., BP.DR


Analytical procedures relying on slow chemical reactions will be implemented as in-line post-column detection of dynamic column-based bioaccessibility tests using multi-syringe flow injection or sequential injection systems. For improving sensitivity and/or selectivity and lessening the reagent consumption, thus waste generation, different approaches such as zone merging, zone trapping, flow programming, and in-line solid phase extraction will be critically investigated. To this end, commuting facilities and monolithic mini-columns will be exploited. Moreover, a novel strategy for heating in flow analysis will be implemented. As application, the simultaneous spectrophotometric determination of atrazine and ametryn in sediment extracts was selected. After system design and dimensioning, the main analytical figures of merit will be evaluated, and the proposed procedure will be applied to large-scale analysis. (AU)

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