Browsing by Author "XX568890"
Now showing items 41-60 of 85
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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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Romero Hasler, Patricio; Arismendi, D.; Richter Duk, Pablo; Soto Bustamante, Eduardo (Taylor & Francis, 2020)The synthesis and phase characterisation of a homologous series of monomers of acrylic phenyl benzoates has been carried out. The characterisation comprises polarised optical microscopy, differential scanning calorimetry ...
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López Ruiz, Beatríz; Sánchez Cabezudo, M.; Richter Duk, Pablo; Mottola, H. A. (AMER CHEMICAL SOC, 1996-05-15)The roles of chemical kinetics and mass transfer in two types of bioreactors (packed-column reactors and rotating disk bioreactors), used with continuous-now sample/reagent(s) processing, are discussed in detail. A normalized ...
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Ascar Estay, María Loreto; Ahumada Torres, Aída Inés de Lourdes; Richter Duk, Pablo (PERGAMON-ELSEVIER SCIENCE LTD, 2008-08)A Study was done on the influence of redox potential on the mobility and availability of the various arsenic chemical forms in a Mollisol soil from central Chile amended with biosolid. Arsenic availability was strongly ...
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Fernández Romero, J. M.; De Castro, M. D. L.; Richter Duk, Pablo; Valcarcel, Miguel (FRIEDR VIEWEG SOHN VERLAG GMBH, 1992-11)An automatic method based on the combination of a flow injection (FI) manifold with a liquid chromatograph has been developed for the enrichment and determination of transition metal ions in water samples. Alternatively, ...
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Richter Duk, Pablo; Luque de Castro, M.; Valcárcel, Miguel (1992)An integrated-sensor method for the determination of formaldehyde based on retention of the reaction product of the analyte with p-rosaniline and sulfite in a flow-cell packed with Dowex 1-X-8 anion exchange resin was ...
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Fiscal-Ladino, Jhon A.; Obando-Ceballos, Mónica; Rosero-Moreano, Milton; Montaño, Diego F.; Cardona, Wilson; Giraldo, Luis F.; Richter Duk, Pablo (Elsevier B.V., 2017)© 2016 Elsevier B.V. Montmorillonite (MMT) clays were modified by the intercalation into their galleries of ionic liquids (IL) based on imidazolium quaternary ammonium salts. This new eco-materials exhibited good features ...
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Zúñiga, Carolina; Calderón del Río, Katia Romina; Richter Duk, Pablo; Carrasco, Rodrigo (ELSEVIER, 2006-01-13)A new mass spectrometry/gas chromatography-mass spectrometry (MS/GC-MS) approach has been developed for the screening and quantitative determination of perchloroethylene (PERC) in workplace and outdoor air samples, which ...
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Ulisse Ulisse, Karla (Universidad de Chile, 2014)Los llamados contaminantes emergentes, están presentes en un variado rango de productos de la vida cotidiana, como los productos farmacéuticos que son liberados de manera indiscriminada a las plantas de tratamiento de ...
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Manzo, Valentina; Ulisse Ulisse, Karla; Rodríguez, Inés; Pereira, Eduardo; Richter Duk, Pablo (Elsevier, 2015)The microextraction of diclofenac and mefenamic acid from water samples was performed by using rotating disk sorptive extraction (RDSE) with molecularly imprinted polymer (MIP) as the sorptive phase. The MIP was synthesized ...
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Griño Morales, Paulina (Universidad de Chile, 2006)Los aerosoles atmosféricos corresponden a partículas suspendidas en la atmósfera, cuyo tamaño oscila entre los 0.001 μm (aerosoles microscópicos) hasta los 100 μm (aerosoles visibles). El material particulado es introducido ...
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Maricán, Adolfo; Ahumada, Inés; Richter Duk, Pablo (2012)In this study, a methodology for pressurized solvent extraction of alkylphenols (APs) and alkylphenol ethoxylates (APEOs) from biosolids was optimized by utilizing a biosolid natively containing these compounds at a high ...
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Jachero, Lourdes; Ahumada Torres, Aída Inés de Lourdes; Fuentes Pérez, Edwar; Richter Duk, Pablo (Elsevier, 2015)A new biomimetic approach for triclosan (TCS) was developed based on the leaching of the analyte from different biosolid-amended agricultural soils and the subsequent extraction of the leachates, using a rotating disk ...
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Polarographic behaviour and determination of nitrofurantoin, chloramphenicol and related compounds Morales, Alfonso; Toral Ponce, María; Richter Duk, Pablo (1984)The polarographic behaviour of nitrofurantoin and chloramphenicol have been studied in pyridine - formic acid buffer and tetramethylammonium chloride solution at pH 4.3. The E<inf>1/2</inf> versus pH and iym ...
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Richter Duk, Pablo; Toral Ponce, María; Muñoz-Vargas, Fernando (1994)A polarographic method for the determination of ranitidine is described, based on the reduction of the nitro group at a dropping-mercury electrode. The proposed method permits the drug to be determined, without any prior ...
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Carrera, M. Eugenia; Momberg, Astrid; Toral Ponce, María; Richter Duk, Pablo (1991)A preconcentration method based on the adsorption on activated carbon of a binary complex of copper(I) with 2,2’-biquinoline, and subsequent polarographic determination of microamounts of copper has been developed. The ...
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Morales, A.; Richter Duk, Pablo; Toral Ponce, María (Royal Society of Chemistry, 1987)In pyridine - formic acid buffer and tetramethylammonium chloride solution over the pH range 0-8.5, nitrofurazone, furazolidone and other nitrofuran derivatives are reduced in a six-electron process, giving rise to a well ...
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Leiva, Claudio; Ahumada, Inés; Sepúlveda, Betsabet; Richter Duk, Pablo (ELSEVIER, 2010)Assessment of the mobility of polychlorinated biphenyls (PCBs) in soils, amended with biosolids at a rate of 30 Mg ha 1, was performed using an incubation process and leaching columns. The incubation process was carried ...
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Narváez, Jessica; Richter Duk, Pablo; Toral Ponce, María (SOC CHILENA QUIMICA, 2007-09)The concentration of trace elements and other analytes of environmental interest was determined in waters and sediments of the Coya and Cachapoal rivers (VI Region, Central Chile), which corresponds to a location highly ...
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Manzo, Valentina; Miró, Manuel; Richter Duk, Pablo (Elsevier, 2014)© 2014 Elsevier B.V. A novel automatic sorptive microextraction approach combining sequential injection-based programmable flow with rotating disk sorptive extraction (RDSE) is proposed for the clean-up and concentration ...