{"id":96344,"date":"2009-01-10T00:00:00","date_gmt":"2009-01-10T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/innovaciones-anala%c2%adticas-para-el-control-de-calidad-del-embalaje-flexible-multicapa-determinacion-de-aditivos-en-polietileno-y-estudio-de-los-procesos-de-deslaminacion\/"},"modified":"2009-01-10T00:00:00","modified_gmt":"2009-01-10T00:00:00","slug":"innovaciones-anala%c2%adticas-para-el-control-de-calidad-del-embalaje-flexible-multicapa-determinacion-de-aditivos-en-polietileno-y-estudio-de-los-procesos-de-deslaminacion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica-analitica\/innovaciones-anala%c2%adticas-para-el-control-de-calidad-del-embalaje-flexible-multicapa-determinacion-de-aditivos-en-polietileno-y-estudio-de-los-procesos-de-deslaminacion\/","title":{"rendered":"Innovaciones anal\u00edticas para el control de calidad del embalaje flexible multicapa. determinaci\u00f3n de aditivos en polietileno y estudio de los procesos de deslaminaci\u00f3n"},"content":{"rendered":"<h2>Tesis doctoral de <strong> \u00e1lvaro Garrido L\u00f3pez <\/strong><\/h2>\n<p>En esta tesis doctoral se presentan dos m\u00e9todos para la determinaci\u00f3n de 11 aditivos en l\u00e1minas de polietileno, mejorando los anteriores en t\u00e9rminos de rapidez, consumo de disolventes y automatizaci\u00f3n. Dichos m\u00e9todos constan de una primera etapa de extracci\u00f3n con l\u00edquidos presurizados y una posterior de an\u00e1lisis tanto por cromatograf\u00eda l\u00edquida en fase normal, como gaseosa con detector de ionizaci\u00f3n de llama, en funci\u00f3n de los analitos, obteniendo resultados similares a otras t\u00e9cnicas. Adem\u00e1s, se ha propuesto la inclusi\u00f3n de una etapa intermedia de oxidaci\u00f3n con peroxodisulfato de sodio, tanto por calentamiento a reflujo como asistida por microondas, reduciendo as\u00ed el tiempo necesario para el an\u00e1lisis de aditivos tipo fosfito. \ttambi\u00e9n se ha estudiado el fen\u00f3meno de deslaminaci\u00f3n del embalaje flexible multicapa causado por ingredientes cosm\u00e9ticos, habi\u00e9ndose identificado algunos de los compuestos que la producen mediante un seguimiento de su efecto en la fuerza de adhesi\u00f3n entre las capas y la determinaci\u00f3n de su presencia en la capa que no est\u00e1 en contacto con el producto mediante el uso de la microextracci\u00f3n en fase s\u00f3lida. \tpor \u00faltimo, el uso de t\u00e9cnicas de an\u00e1lisis de superficie ha permitido proponer el mecanismo que produce la deslaminaci\u00f3n en embalajes multicapa unidos por contraencolado y por extrusi\u00f3n-laminaci\u00f3n.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Innovaciones anal\u00edticas para el control de calidad del embalaje flexible multicapa. determinaci\u00f3n de aditivos en polietileno y estudio de los procesos de deslaminaci\u00f3n<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Innovaciones anal\u00edticas para el control de calidad del embalaje flexible multicapa. determinaci\u00f3n de aditivos en polietileno y estudio de los procesos de deslaminaci\u00f3n <\/li>\n<li><strong>Autor:<\/strong>\u00a0 \u00e1lvaro Garrido L\u00f3pez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Rioja<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/10\/2009<\/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>Mar\u00eda Teresa Tena V\u00e1zquez De La Torre<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: \u00e1ngel R\u00edos castro <\/li>\n<li>olatz Zuloaga zubieta (vocal)<\/li>\n<li>john Forsyth (vocal)<\/li>\n<li>isaac Rodr\u00edguez pereiro (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de \u00e1lvaro Garrido L\u00f3pez En esta tesis doctoral se presentan dos m\u00e9todos para la determinaci\u00f3n de 11 aditivos [&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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