Determination of Kresoxim-Methyl in Water and in Grapes by High-Performance Liquid Chromatography (HPLC) Using PhotochemicalInduced Fluorescence and Dispersive Liquid-Liquid Microextraction (DLLME)
Determination of Kresoxim-Methyl in Water and in Grapes by High-Performance Liquid Chromatography (HPLC) Using PhotochemicalInduced Fluorescence and Dispersive Liquid-Liquid Microextraction (DLLME).pdf (64.39Kb)
T. Toloza, Carlos A.
S. Almeida, Joseany M.
P. Silva, Lillian O.
Macedo, Rosana C.
Lamounier, Ana Paula
Aucelio, Ricardo Q.
da Cunha, Alessandra L. M. C.
Show full item record
Show full item record
AbstractA high-performance chromatographic method was developed to determine the fungicide kresoxim-methyl. Off-line photochemical derivatization was used to induce the formation of a stable and fluorescent product since the fungicide does not present natural fluorescence. Intense fluorescence at 370/430nm was achieved by treating the analyte in solution at pH 6 to ultraviolet light for 45s. The chromatographic conditions included isocratic elution with 50/ 50% (v/v) acetonitrile/water and the photochemical product appeared at a retention time of 7.2min. The short and long term stabilities of the photoproduct were evaluated and variation of less than 5% was achieved. The limits of detection in water samples and in grapes samples were 0.019mg kg1 and 0.065mg kg1 of kresoxim-methyl residue, respectively. The linear response covered three orders of magnitude up to 10.6mg kg1 of kresoxim-methyl. The robustness was evaluated through a Box–Behnken experimental design showing the insignificance of all factors and their interactions. The potential interference of tebuconazole for the determination of kresoxim-methyl was studied. The use of the dispersive liquid-liquid microextraction (DLLME) allowed recoveries between 80% and 101% depending on concentration with the minimum generation of waste products.
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Diseño de un sistema de gestión ambiental en el parque Biotemático Megua, en el municipio de Galapa – Atlántico como muestra de ecoturismo sostenible, conservación de fauna silvestre y educación ambiental Herrera Fuentes, Jose David (2014-08-01)Park Biotematico Megua is dedicated to the ecotourism activity in the Department of the Atlantic, thus generates an environmental impact to the ecosystem, a Tropical dry Bosque which is nearing extinction. Activities carried ...
Cabas García, Mauricio Ricardo (Universidad de la Costa CUC, 2013-09-25)aha Hadid is an architect who seeks to create or determine the space, she does not accept default, and creates her own architectural forms, this is known as spatial architecture formal determination, does not resort to any ...
Determinación de las propiedades dielectricas de los combustibles, sus mezclas y del suelo, así como su impacto en un uso eficiente de los recursos energéticos y en la determinación de la contaminación ambiental García Reina, Francisco; Méndez García, Amarilys; Martínez Ibáñez, Lázaro (International Journal of Management Science and Operations Research (IJMSOR), 2019)The study of the dielectric properties of materials is one of the main tools currently used for their characterization, both structurally and from the point of view of molecular interactions. In our University it has been ...