Browsing by Author "Richter Duk, Pablo"
Now showing items 1-20 of 36
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Richter Duk, Pablo; Toral Ponce, María; Abbott, Bernardo (WILEY-V C H VERLAG GMBH, 2002-10)A flow through electrochemical cell was designed for the implementation of a simple, efficient, rapid and sensitive method for determination of mercury in water samples by anodic stripping voltammetry. A solid gold or a ...
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Richter Duk, Pablo; Seguel, Rodrigo; Ahumada Torres, Aída Inés de Lourdes; Verdugo, R.; Narváez, Jessica; Shibata, Yasuyuni (SOCIEDAD CHILENA DE QUIMICA, 2004-12)The presence of high concentrations of arsenic and copper was determined in most of the environmental matrixes under study (river water, river sediments, and soils), which suggests a real impact of the copper mining activity ...
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Richter Duk, Pablo; Toral Ponce, María; Tapia, A. Eugenia; Ubilla, Claudia; Bunster, Mauricio (Sociedad Chilena de Química, 1996)Se propone un método de análisis por inyección en flujo (FIA) con flujo interrumpido para la determinación simultánea de cobre y zinc. El método se basa en las diferentes velocidades en que se produce la reacción entre ...
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Ahumada Torres, Aída Inés de Lourdes; Gudenschwager Soruco, Orianne; Carrasco Rimassa, María Adriana; Castillo Morales, Gabriela; Ascar Estay, María Loreto; Richter Duk, Pablo (ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2009-06)The purpose of this study was assessing Cu and Zn availabilities in soils amended with a biosolid through the determination of their sequentially extracted chemical forms and their relationship with the contents of these ...
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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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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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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 ...
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Toledo Neira, Carla; Enríquez, Pedro; Richter Duk, Pablo (Sociedade Brasileira de Química, 2013)A rapid and efficient method based on the integration of pressurized solvent extraction (PSE) with solid phase extraction (SPE) cleanup and gas chromatography system with electron capture detection (GC-ECD) has been developed ...
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Manzo, Valentina; Honda, Luis; Navarro, Orielle; Ascar Estay, María Loreto; Richter Duk, Pablo (Elsevier, 2014)In this study, six non-steroidal anti-inflammatory drugs (NSAIDs) were extracted from water samples using the rotating-disk sorptive extraction (RDSE) technique. The extraction disk device contains a central cavity that ...
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Cañas, Alejandro; Valdebenito, Samuel; Richter Duk, Pablo (Microextraction Techniques, 2014)A novel extraction approach was developed based on rotating-disk sorptive extraction (RDSE). In this approach the rotating-disk extraction device consists of a Teflon disk, with a cavity that is loaded with a commercial ...
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Richter Duk, Pablo; Toral Ponce, María; Parra Ortíz, María Valentina; Fuentes, Sandra; Araya, Eyleen (Sociedad Chilena de Química, 1995)Se desarrolla un método automático de análisis por inyección en flujo (FIA) para la determinación simultánea de hierro y titanio en mezclas. El método se basa en el diseño de una configuración FIA que incluye la reducción ...
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Carrera, M. E.; Momberg, Astrid; Toral Ponce, María; Richter Duk, Pablo (Marcel Dekker, 1991)A preconcentration method based on the adsorption on activated carbon of a binary complex of copper(I) with 2,2¡-boquinoline, and subsequent polarographic determination of microamounts of copper has been developed. The ...