Browsing by Author "Báez Contreras, María Estrella"
Now showing items 1-20 of 22
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(MARCEL DEKKER INC, 2001)This article reports on methabenzthiazuron [1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea] (MBT) adsorption process on six agricultural allophanic and nonallophanic soils. The effect of amendment with exogenous organic matter ...
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(Sociedad Chilena de Química, 2003)The feasibility of MASE application in the determination of Bensulfuron-methyl (BSM) in soils with different organic matter content, consequently with a different capability to absorb this herbicide is studied. Hydrolysis ...
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(2013)Atrazine sorption was studied in six Andisol and Ultisol soils. Humic and fulvic acids and humin contributions were established. Sorption on soils was well described by the Freundlich model. Kf values ranged from 2.2−15.6 ...
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(Universidad de ChileCyberDocs, 2009)
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(Universidad de ChilePrograma Cybertesis, 2008)El Plomo tiene efectos tóxicos sobre la salud del ser humano, principalmente asociados a encefalopatías, irritabilidad, enfermedades de riñón y alteraciones de las funciones reproductivas. El pelo y las uñas son matrices ...
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(Universidad de ChileCyberDocs, 2008)
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(SOCIEDAD CHILENA DE QUIMICA, 2003-03)A high performance thin layer chromatography (HPTLC) method for the determination of atrazine in aqueous soil extracts was studied. To verify the applicability of the method in environmental concern studies, soil samples ...
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(2013)Seven heavy polycyclic aromatic hydrocarbons (PAHs) of concern on the US Environmental Protection Agency priority pollutant list (benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, dibenz[a,h ...
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(Universidad de ChilePrograma Cybertesis, 2007)
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(Universidad de Chile, 2009)Desde hace poco más de medio siglo, la población mundial ha mantenido un crecimiento vertiginoso y con ello algunos problemas no menores han aumentado cada día, como el hambre en algunos continentes, la falta de terrenos ...
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(Universidad de Chile, 2006)
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(Universidad de Chile, 2004)En el presente trabajo se desarrolló un método analítico de extracción que permite la determinación simultánea de atrazina (2-cloro-4-etilamino-6-isopropilamino- 1,3,5 - lrtiazina) y sus metabolitos, en suelos chilenos ...
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(Universidad de Chile, 2023)La gran demanda de alimentos por parte de la población mundial ha implicado una intensificación en el uso de pesticidas, sin embargo, es necesario desarrollar tecnologías que disminuyan el impacto negativo que generan estos ...
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(ELSEVIER, 2006-09-25)A simple microwave-assisted extraction and partitioning method (MAEP) using water-acetonitrile and n-hexane for desorption and simultaneous partitioning, respectively, together with gas chromatography (GC) was studied to ...
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(ROYAL SOC CHEMISTRY, 2003)A microwave-assisted solvent extraction (MASE) method for the determination of methabenzthiazuron (MBT) in soil samples by HPLC-DAD ( diode array detection) was evaluated. Spiked soil samples having different physico-chemical ...
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(ELSEVIER SCIENCE BV, 2007-10-26)This work describes an optimised method for the determination of six representative organophosphorus pesticides (OPPs) (diazinon, parathion, methyl pirimiphos, methyl parathion, ethoprophos, and fenitrothion) in agricultural ...
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(Sociedad Chilena de Química, 1999)Se estableció la linealidad, sensibilidad analítica, límite de detección, límite de identificación y precisión de un método para la determinación simultánea por HPLC-DAD de trece plaguicidas pertenecientes a diferentes ...
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(MUNKSGAARD INT PUBL LTD, 2000-04)Background/Aims: Low blood Se levels have been previously shown in normal pregnancies (third trimester) and significantly lower levels in patients with intrahepatic cholestasis of pregnancy (ICP), in Finland and in Chile, ...
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(Sociedad Chilena de Química, 1999)A study of matrix effects arising from river water samples using C18 SPE columns in the determination of 38 pesticides having different chemical properties is presented. Recoveries from river water samples of different ...
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(Springer, 2015)Sorption-desorption behavior of six pesticides and some degradation products was assessed on seven agricultural volcanic and nonvolcanic soils belonging to Andisol, Ultisol, Mollisol, and Alfisol orders. The global ...
