http://dx.doi.org/10.4322/sc.2016.025   Basic principles and applications of liquid phase microextraction techniques Nerin, Cristina Palavras-chave: Microextraction, trace analysis, LPME, micro, devices. Resumo: The main liquid phase techniques for sample preparation have been explored. Among them, two phases devices such as single drop microextraction (SDME) and hollow fibre liquid phase microextraction (HFLPME), either in head space or […]

http://dx.doi.org/10.4322/sc.2016.024   Functionalized natural clays with ionic liquids for ochratoxin A microextraction using packed hollow fiber Obando, Mónica; Cardenas, Viviana; Montaño, Diego; Casanova, Herley; Giraldo, Luis F.; Cardona, Wilson; Rosero-Moreano, Milton Palavras-chave: Sodium-montmorillonite, ionic liquids, packed hollow fiber, microextraction. Resumo: The use of natural clays from colombian mines in the analytes extraction for chromatographic analysis […]

http://dx.doi.org/10.4322/sc.2016.024 Arcillas naturales funcionalizadas con líquidos iónicos para microextracción de ocratoxina A por membrana hueca empacada Obando, Mónica; Cardenas, Viviana; Montaño, Diego; Casanova, Herley; Giraldo, Luis F.; Cardona, Wilson; Rosero-Moreano, Milton Palavras-chave: Montmorillonita-Na, líquidos iónicos, membrana hueca empacada, microextracción. Resumo: El uso de las arcillas naturales provenientes de minas colombianas en la extracción de analitos […]

http://dx.doi.org/10.4322/sc.2016.023   Determinación de compuestos fenólicos mediante microextracción con solvent bar usando HPLC-UV en muestras de aguas residuales contaminadas con vinazas Taborda, Wilson Alejandro Largo; Moreano, Milton Hernando Rosero Palavras-chave: solvent bar, vinazas, compuestos fenólicos, COT, HPLC-UV, materia orgánica, destilería. Resumo: El propósito de este estudio fue desarrollar un método nuevo de microextracción en fase […]

http://dx.doi.org/10.4322/sc.2016.022 Implementation of a dynamic extraction solvent assisted by sonication (DSASE) matrices erythroxylum coca leaf for subsequent analysis of cocaine by gas chromatography with flame ionization detector (GC-FID)) López, Ángela M.; Alvarez, Eliana; Cortés, Carolina; Rosero-Moreano, Milton; Taborda, Gonzalo; Garzón, William; Bernal, Hernando; Correa, Leonardo Palavras-chave: Cocaine, gas chromatography with flame ionization detector (GC – […]

http://dx.doi.org/10.4322/sc.2016.022 Implementación de una extracción dinámica con disolvente asistida por sonicación (DSASE) en matrices de hoja de erythroxylum coca para el posterior análisis de cocaína por cromatografía de gases con detector de ionización de llama (CG–FID) López, Ángela M.; Alvarez, Eliana; Cortés, Carolina; Rosero-Moreano, Milton; Taborda, Gonzalo; Garzón, William; Bernal, Hernando; Correa, Leonardo Palavras-chave: Cocaína, cromatografía […]

http://dx.doi.org/10.4322/sc.2016.021   Optimización del tiempo de adsorción y desorción de la microextración en fase sólida en el espacio de cabeza de los compuestos volátiles en el café tostado y molido Ortiz, Aristofeles; Herrera, Néstor Miguel Riaño; Realpe, Isabel del Socorro Bravo Palavras-chave: Volátiles de café tostado y molido, SPME, CG, MS, Tiempos de Adsorción y […]

http://dx.doi.org/10.4322/sc.2016.020   Determination off-line and on-line of methidathion trace in drinking water Hernández-Rojas, M. E.; García-Camacho, P.; Baéz-Pimiento, S.; Castañon-Alonso, S. L. Palavras-chave: drinking water, methidathion, SPE. Resumo: In this study, a fast, simple and sensitive analytical method was developed for the determination of methidathion, organophosphorus pesticide, in water. The methidathion is determined at µg […]

http://dx.doi.org/10.4322/sc.2016.019   V WARPA COLOMBIA 2015 Meeting Report and Welcome VII WARPA PORTUGAL 2016 Rosero-Moreano, Milton; Queiroz, Maria Eugenia Palavras-chave: Meeting report, Colombia, Manizales, Universidad de Caldas. Resumo: A little history. The WARPA (Workshop in Recent Advances on Sample Preparation) born as an initiative of Prof. Fernando Lanças and Prof. Maria Eugenia Queiroz, and has […]

http://dx.doi.org/10.4322/sc.2016.018   Presentation or miniEditorial – Special issue of Scientia Chromatographica WARPA Colombia 2015 Rosero-Moreano, Milton Palavras-chave: editorial Resumo: One of the most important steps in any analytical procedure is sample preparation. Most analyses are carried out on samples containing complex mixtures with very small amounts of the chemicals which need to be identified and/or […]