Determination of Kresoxim-Methyl in Water and in Grapes by High-Performance Liquid Chromatography (HPLC) Using PhotochemicalInduced Fluorescence and Dispersive Liquid-Liquid Microextraction (DLLME)
Pre-Publicación
2020
Universidad de la Costa
A 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.
- Artículos científicos [3154]
Descripción:
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
Título: 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
Tamaño: 64.39Kb
PDFLEER EN FLIP
Descripción: 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
Título: 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
Tamaño: 64.39Kb
PDFLEER EN FLIP
Título: 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
Tamaño: 64.39Kb
PDFLEER EN FLIP
Descripción: 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
Título: 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
Tamaño: 64.39Kb
PDFLEER EN FLIP
El ítem tiene asociados los siguientes ficheros de licencia:
Ítems relacionados
Mostrando ítems relacionados por Título, autor o materia.
-
La liquidez en las formas de la arquitectura japonesa contemporánea. Una mirada a la obra de Junya Ishigami
Castro Marcucci, Andrea; Belandria Gutiérrez, Daniel; Machado, María Verónica (Universidad de la Costa, 2021-10-07)El espacio arquitectónico de la contemporaneidad, específicamente en las primeras décadas del siglo XXI, ha buscado estrategias para acercarse a las dinámicas de la sociedad que la habita, catalogada por el sociólogo Zygmunt ... -
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 ... -
Newtonian Heating Effects of Oldroyd-B Liquid Flow with Cross-Diffusion and Second Order Slip
Loganathan, K.; Tamilvanan, K.; Viloria, Amelec; Varela, Noel; Pineda Lezama, Omar Bonerge (Corporación Universidad de la Costa, 2020-07-13)The current study highlights the Newtonian heating and second-order slip velocity with cross-diffusion effects on Oldroyd-B liquid flow. The modified Fourier heat flux is included in the energy equation system. The present ...