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<dc:title>Determinación cuantitativa de diisobutil ftalato en líquidos mediante ATR-FTIR: estudio inicial</dc:title>
<dc:creator>Martín Tapia, Eva</dc:creator>
<dc:contributor>Herrero Gutiérrez, Ana</dc:contributor>
<dc:contributor>Sanllorente Méndez, Silvia</dc:contributor>
<dc:contributor>Universidad de Burgos. Departamento de Química</dc:contributor>
<dc:subject>diisobutil ftalato</dc:subject>
<dc:subject>ATR-FTIR</dc:subject>
<dc:subject>análisis multivariante</dc:subject>
<dc:subject>determinación cuantitativa</dc:subject>
<dc:subject>diisobutyl phthalate</dc:subject>
<dc:subject>multivariate analysis</dc:subject>
<dc:subject>quantitative determination</dc:subject>
<dc:subject>Química analítica</dc:subject>
<dc:subject>Chemistry, Analytic</dc:subject>
<dc:description>Los ftalatos son compuestos utilizados como plastificantes; su presencia está regulada, sin embargo, el diisobutil ftalato (DiBP) aún no está sujeto a prohibición en la UE. Aquí, se aborda su determinación cuantitativa en líquidos mediante espectroscopia infrarroja con transformada de Fourier en el modo reflexión total atenuada (ATR-FTIR). Se utilizan la regresión de componentes principales (PCR) y por mínimos cuadrados parciales (PLS). &#xd;
Se estudia el análisis directo de DiBP en ciclohexano. Se evalúa qué efecto tienen usar ciclohexano o aire para registrar el espectro del fondo, el número de barridos que se registran, y el pretratamiento de los datos espectrales. Se calculan algunas figuras de mérito; encontrando capacidades de detección sobre 2.000-3.000 ppm ( =  = 0.05).&#xd;
Se incluye una etapa de preconcentración para incrementar la sensibilidad; se estudia la influencia del número de depósitos. Se alcanzan capacidades de detección de hasta 52 ppm ( =  = 0.05).</dc:description>
<dc:description>Phthalates are a group of synthetic compounds widely used as plasticizers, mainly&#xd;
used to increase plastic flexibility, resistance and durability. These substances may be&#xd;
found in toys, cosmetics, plastic bottles, etc. Their presence in some fields is regulated&#xd;
to avoid risks to the health. Diisobutyl phthalate (DiBP) is among these phthalates,&#xd;
many of which are banned in toys, childcare articles or cosmetics; however, DiBP has&#xd;
so far not been subjected to EU ban.&#xd;
The determination of DiBP in liquid samples by means of attenuated total&#xd;
reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy is approached in this&#xd;
work. Soft multivariate regression models, principal component regression (PCR) and&#xd;
partial least squares regression (PLS), are used for the quantitative analysis.&#xd;
The level of concentration for the direct analysis of DiBP in cyclohexane is studied.&#xd;
It is assessed what effect the use of cyclohexane or air to collect the background&#xd;
spectrum, the number of scans to be collected in the sample measurement, and the&#xd;
pretreatment of spectral data have on the analytical determination. Some figures of&#xd;
merit are calculated to establish the performance of the analytical method. Values of&#xd;
the capability of detection around 2.000-3.000 ppm are achieved (a = b = 0.05).&#xd;
A preconcentration step is included in the method in order to increase its sensitivity.&#xd;
The influence of the number of depositions on the performance of the analytical&#xd;
method is studied. Capabilities of detection down to 52 ppb are reached (a = b = 0.05).</dc:description>
<dc:date>2018-10-24T10:55:24Z</dc:date>
<dc:date>2018-10-24T10:55:24Z</dc:date>
<dc:date>2018</dc:date>
<dc:type>info:eu-repo/semantics/bachelorThesis</dc:type>
<dc:type>info:eu-repo/semantics/acceptedVersion</dc:type>
<dc:identifier>http://hdl.handle.net/10259/4981</dc:identifier>
<dc:language>spa</dc:language>
<dc:rights>Attribution-NonCommercial-NoDerivatives 4.0 International</dc:rights>
<dc:rights>http://creativecommons.org/licenses/by-nc-nd/4.0/</dc:rights>
<dc:rights>Este documento está sujeto a una licencia de uso Creative Commons, por la cual está permitido hacer copia, distribuir y comunicar públicamente la obra siempre que se cite al autor original y no se haga de él uso comercial ni obra derivada</dc:rights>
<dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
<dc:format>application/pdf</dc:format>
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