{"id":70832,"date":"2018-03-09T23:15:21","date_gmt":"2018-03-09T23:15:21","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/desarrollo-de-metodos-de-analisis-de-pesticidas-organoclorados-en-matrices-ambientales\/"},"modified":"2018-03-09T23:15:21","modified_gmt":"2018-03-09T23:15:21","slug":"desarrollo-de-metodos-de-analisis-de-pesticidas-organoclorados-en-matrices-ambientales","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/desarrollo-de-metodos-de-analisis-de-pesticidas-organoclorados-en-matrices-ambientales\/","title":{"rendered":"Desarrollo de metodos de analisis de pesticidas organoclorados en matrices ambientales"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Estefania Concha Gra\u00f1a <\/strong><\/h2>\n<p>En la presente memoria se han desarrollado diversas metodolog\u00edas anal\u00edticas para el an\u00e1lisis de pesticidas organoclorados en diferentes matrices ambientales.  se proponen distintas condiciones de separaci\u00f3n cromatogr\u00e1fica empleando diferentes fases estacionarias y longitudes de columna consiguiendo separar 21 pesticidas organoclorados, as\u00ed como varias opciones de inyecci\u00f3n en cromatograf\u00eda de gases: un sistema convencional de inyecci\u00f3n split\/splitless, sistemas de inyecci\u00f3n split\/splitless con temperatura programada (pss), y un inyector on-column de grandes vol\u00famenes (lvoci), utilizando dise\u00f1os de experiencias, que permiten determinar que variables influyen en la respuesta, y llevar a cabo la otpimizaci\u00f3n de las mismas. Se han alcanzado l\u00edmites de detecci\u00f3n muy bajos, con incrementos de sensibilidad de m\u00e1s de 30 veces para el inyector pss y de tres \u00f3rdenes de magnitud con el inyector lvoc en comparaci\u00f3n con el inyector split\/splitless, lo que permite determinar los pesticidas a niveles de ultratraza. Estos modos de inyecci\u00f3n han permitido reducir el volumen de muestra que se necesita procesar, as\u00ed como alguna etapa de concentraci\u00f3n de los m\u00e9todos de an\u00e1lisis.  se desarrollaron dos procedimientos para el an\u00e1lisis de pesticidas en muestras acuosas. Uno de ellos consiste en un m\u00e9todo de extracci\u00f3n en fase s\u00f3lida que emplea discos laminares con fase c18, que permiten un flujo de paso de muestra elevado, y no precisan del filtrado previo de la misma. El otro consiste en una microextracci\u00f3n l\u00edquido-l\u00edquido que precisa de peque\u00f1as cantidades de muestra (10 ml) y disolvente (2 ml de acetato de etilo). con ambos m\u00e9todos se han alcanzado l\u00edmites de detecci\u00f3n que permiten la determinaci\u00f3n de los pesticidas a los niveles establecidos por la legislaci\u00f3n m\u00e1s restrictiva. Adem\u00e1s se han evaluado las p\u00e9rdidas de los pesticidas organoclorados por adsorci\u00f3n a los recipientes, que se minimizan por adici\u00f3n de un 20 % d<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Desarrollo de metodos de analisis de pesticidas organoclorados en matrices ambientales<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Desarrollo de metodos de analisis de pesticidas organoclorados en matrices ambientales <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Estefania Concha Gra\u00f1a <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 A coru\u00f1a<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 19\/10\/2004<\/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>Soledad Muniategui Lorenzo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: dario Prada rodriguez <\/li>\n<li> Mejuto marti Mar\u00eda  del carmen (vocal)<\/li>\n<li>felipe Mac\u00edas v\u00e1zquez (vocal)<\/li>\n<li>fatima Alpendurada Mar\u00eda (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Estefania Concha Gra\u00f1a En la presente memoria se han desarrollado diversas metodolog\u00edas anal\u00edticas para el an\u00e1lisis de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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