{"id":54980,"date":"2006-10-10T00:00:00","date_gmt":"2006-10-10T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/extraccion-por-microondas-y-fluidos-presurizados-de-contaminantes-organicos-en-muestras-ambientales-y-alimentos\/"},"modified":"2006-10-10T00:00:00","modified_gmt":"2006-10-10T00:00:00","slug":"extraccion-por-microondas-y-fluidos-presurizados-de-contaminantes-organicos-en-muestras-ambientales-y-alimentos","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/extraccion-por-microondas-y-fluidos-presurizados-de-contaminantes-organicos-en-muestras-ambientales-y-alimentos\/","title":{"rendered":"Extracci\u00f3n por microondas y fluidos presurizados de contaminantes org\u00e1nicos en muestras ambientales y alimentos"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Vicent Anf\u00f3s Yus\u00c1\u00a0 Pelech\u00c1\u00a0 <\/strong><\/h2>\n<p>El presente estudio, basada en seis trabajos originales (i-vi), describe distintos procedimientos de extracci\u00f3n asistida por microondas (mae) y extracci\u00f3n mediante fluido presurizado (pfe) de diferentes familias de contaminantes en matrices ambientales y alimentos.  la mae se ha empleado para la extracci\u00f3n de hidrocarburos polic\u00edclicos arom\u00e1ticos (pahs),  y  sustancias polihalogenadas como los ocps, pbdes, pcns y pbbs, en dispositivos de membranas semipermeables (spmds) y sedimentos. por otro lado la pfe se ha utilizado para la extracci\u00f3n de pahs en part\u00edculas del aire ambiente (pm10) y mejillones, as\u00ed como de acrilamida en alimentos.  para cada uno de los  seis procedimientos anal\u00edticos desarrollados se ha optimizado el proceso de extracci\u00f3n, bien utilizando un sistema convencional de optimizaci\u00f3n de \u00abun factor cada vez\u00bb (i, iv, v) o mediante el dise\u00f1o de experimentos (doe) (ii, iii,vi). En general, los par\u00e1metros objeto de optimizaci\u00f3n han sido el tipo de disolvente, el tiempo de extracci\u00f3n, volumen de disolvente, la temperatura y la presi\u00f3n. En todos los casos el nuevo procedimiento de extracci\u00f3n se ha comparado con el procedimiento de extracci\u00f3n convencional m\u00e1s utilizado, como el soxhlet, la di\u00e1lisis o la sonicaci\u00f3n.  en cinco de los seis trabajo (i-v) se ha empleado una etapa de purificaci\u00f3n (clean-up) basada en la cromatograf\u00eda de permeaci\u00f3n por gel (gpc), a fin de eliminar sustancias coextraidas de la matriz tales como grasas, olig\u00f3meros de polietileno o azufre que pueden interferir en la etapa anal\u00edtica. Esta t\u00e9cnica permite la  automatizaci\u00f3n de \u00e9sta etapa, y logra una elevada eficacia y productividad. En el trabajo sobre  determinaci\u00f3n de acrilamida (vi) la purificaci\u00f3n empleada se ha basado en la precipitaci\u00f3n mediante un reactivo apropiado (carrez).  la cromatograf\u00eda de gases (gc) acoplada a un detector de espectrometria de masas (ms) en tandem (ms-ms), se ha empleado para la determinaci\u00f3n<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Extracci\u00f3n por microondas y fluidos presurizados de contaminantes org\u00e1nicos en muestras ambientales y alimentos<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Extracci\u00f3n por microondas y fluidos presurizados de contaminantes org\u00e1nicos en muestras ambientales y alimentos <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Vicent Anf\u00f3s Yus\u00c1\u00a0 Pelech\u00c1\u00a0 <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Universitat de val\u00e9ncia (estudi general)<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 10\/10\/2006<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Agust\u00edn Ignacio Pastor Garc\u00eda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan  Francisco Cacho palomar <\/li>\n<li>purificaci\u00f3n L\u00f3pez mah\u00eda (vocal)<\/li>\n<li>damia Barcelo culleres (vocal)<\/li>\n<li>fidel Toldr\u00e1 vilardell (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Vicent Anf\u00f3s Yus\u00c1\u00a0 Pelech\u00c1\u00a0 El presente estudio, basada en seis trabajos originales (i-vi), describe distintos procedimientos de 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