Browsing by Author "Richter Duk, Pablo"
Now showing items 21-40 of 68
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Manzo, Valentina; Orielle, Navarro; Honda, Luis; Sánchez, Karen; Toral Ponce, María; Richter Duk, Pablo (2013)The microextraction of crystal violet (CV) from water samples into polydimethylsiloxane (PDMS) using the rotating disk sorptive extraction (RDSE) technique was performed. The extracting device was a small Teflon disk that ...
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Corrotea, Yanina; Aguilera, Natalie; Honda, Luis; Richter Duk, Pablo (Taylor & Francis, 2016)A simple and green analytical method based on the use of rotating disk sorptive extraction is reported for the simultaneous determination of hormones in wastewater. The analytes were 17-estradiol, estriol, and 17 ...
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Toral Ponce, María; Richter Duk, Pablo; Araya, Eyleen; Fuentes, Sandra (Marcel Dekker Inc., 1996)
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Toral Ponce, María; Richter Duk, Pablo; Silva, Lorena; Salinas, Andrea (Academic Press, 1993)Cobalt and iron can be determined simultaneously by first derivative spectrophotometry. The method does not require simultaneous equations to be resolved and it is based on the separation of the analytes, by liquid-liquid ...
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Rocco, Gabriela; Toledo, Carla; Ahumada Torres, Aída Inés de Lourdes; Sepúlveda, Betsabet; Cañete Molina, Alvaro Félix; Richter Duk, Pablo (ELSEVIER SCIENCE BV, 2008-06-06)An efficient continuous pressurized solvent extraction (PSE) method assisted by ultrasound energy was developed for the extraction of polychlorinated biphenyls (PCBs) from biosolids. Analytes were determined in the extracts ...
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Vallejo, B.; Richter Duk, Pablo; Toral Ponce, María; Tapia, C.; De Castro, M. D. L. (ELSEVIER SCIENCE BV, 2001-06-12)A selective dynamic method for the determination of sulphide in Liquid and solid samples based on the integration of hydrogen sulphide pervaporation and potentiometric monitoring of the sulphide in a laboratory-made module ...
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Richter Duk, Pablo; Castillo Morales, A.; Gómez Jeria, Juan; Morales Lagos, Demian (ROYAL SOC CHEMISTRY, 1988-06)An electrochemical study of the (+/-)-1-(2,5-DIMETHOXY-4-NITROPHENYL)-2-AMINOPROPANE, which differs from similar compounds in that a hydrophilic nitro group replaces hydrophobic substituents on the 4-position of the benzene ...
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Especiación y movilidad de arsénico en sistemas agua-sedimento de ríos de la VI Región de Chile Narvaez Fernandez, Jessica Fabiola (Universidad de Chile., 2005)La presente tesis se desarrollo y optimizo una metodología analítica, la cual permitió la determinación de diferentes formas químicas de arsénico (As(III), aS(v), MMA (monometilarsoniato) y DMA (demitilarsinato) en muestras ...
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Arriagada García, María Gabriela (Universidad de Chile, 2020)En primera instancia, se estudió la conducta espectral de cada uno de los analitos pertenecientes a las familias involucrados en la investigación. Para seleccionar la longitud de excitación de los analitos en estudio se ...
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Cantarero Calderón, Romina Cecilia (Universidad de Chile, 2014)Chile se ubica en el primer lugar de Latinoamérica en lo que se refiere al procesamiento de aguas residuales, lo cual ha posibilitado paulatinamente la descontaminación de los cursos de aguas superficiales y marítimos. El ...
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Rivas Perez, Jorge Esteban (Universidad de Chile., 2011)Los avances cientificos y tecnologicos han permitido la sintesis y utilizacion de nuevos productos quimicos sinteticos, lo que conlleva a un creciente desarrollo economico e industrial, y por ende a una mejor calidad de ...
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Miranda Tafuku, Felipe Andrés (Universidad de Chile, 2020)Un disruptor endocrino (DE) es un compuesto químico o mezcla de compuestos capaz de alterar la estructura o función del sistema endocrino y causar efectos adversos. Estos compuestos se han encontrado en el aire, efluentes ...
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Pérez Farías, Catalina Alejandra (Universidad de Chile, 2010)
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Castro Rojas, Ximena Andrea (Universidad de Chile, 2010)El nonilfenol etoxilato y el nonilfenol son compuestos utilizados como surfactantes no iónicos. El nonilfenol ha generado gran preocupación debido a su acción como disruptor endocrino, efecto que ha podido ser apreciado ...
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Ahumada Torres, Aída Inés de Lourdes; Escudero, Paula; Ascar Estay, María Loreto; Mendoza, Jorge; Richter Duk, Pablo (MARCEL DEKKER INC, 2004-06)Copper (Cu) mining activities are very important in central Chile. The present study consists in determining the distribution and availability of copper, arsenic (As), and lead (Pb) in soils near a smelting facility, in ...
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Alarcón, Francis; Báez Contreras, María Estrella; Bravo, Manuel; Richter Duk, Pablo; Escandar, Graciela M.; Olivieri, Alejandro C.; Fuentes Pérez, Edwar (Elsevier B.V., 2013-06-15)The possibility of simultaneously determining seven concerned heavy polycyclic aromatic hydrocarbons (PAHs) of the US-EPA priority pollutant list, in extra virgin olive and sunflower oils was examined using unfolded ...
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Richter Duk, Pablo; Toral Ponce, María; Jaque, Pablo (WILEY-V C H VERLAG GMBH, 2000-03)The analytical application of a simple polarographic Row through cell, which was previously designed for the continuous polarographic analysis of organic compounds in pharmaceuticals and urine, is proposed in this work for ...
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Richter Duk, Pablo; Luque de Castro, M. D.; Valcarcel, Miguel (Marcel Dekker, Inc., 1993)A sensor for the determination of cadmium based on retention of the CdI4" complex on a QAE Sephadex resin located in the flow-cell of a conventional photometric detector and on subsequent complex displacement reaction with ...
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Richter Duk, Pablo; Toral Ponce, María; Quiroz, Gabriela; Jaque, Pablo (JOHN WILEY & SONS INC, 1997)A simple design of a polarographic flow-through cell is proposed in which a conventional dropping mercury electrode (DME) is used as working electrode, and a mercury pool and a platinum wire are used as the reference and ...
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Toledo, Carla; Enríquez, Pedro; Garrido, Mariano; Fernández-Band, Beatríz; Richter Duk, Pablo (TAYLOR & FRANCIS INC, 2010)A headspace-mass spectrometry with alternative chromatographic separation using a column switching system was developed for the screening and confirmation of BTEX and styrene in comestible oils. According to the position ...