Browsing by Author "XX568890"
Now showing items 1-20 of 74
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Vieira, Camila M. S.; Mafra, Gabriela; Brognoli, Rafael; Richter Duk, Pablo; Rosero Moreano, Milton; Carasek, Eduardo (Elsevier, 2020)In this study, a high throughput approach to rotating-disk sorptive extraction (RDSE) using laminar cork as extraction phase is demonstrated for the first time in the determination of 20 multiclass organic micro-pollutants ...
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Narváez, Jessica; Richter Duk, Pablo; Toral Ponce, María (SPRINGER HEIDELBERG, 2005-04)A simple continuous flow method is proposed to eliminate copper interference in arsenic speciation by hydride generation, based on the selective retention of this interfering ion in an iminodiacetate chelating resin previous ...
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Ahumada, Inés; Maricán, Adolfo; Retamal, Mauricio; Pedraza, Cristina; Ascar, Loreto; Carrasco, Adriana; Richter Duk, Pablo (Sociedade Brasileira de Quimica, 2010)The effect of biosolid application on the distribution and extractability of Cr, Cu, Ni, Pb, and Zn was assessed in Mollisol soils from an important agricultural zone in central Chile. These were amended with biosolids at ...
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Becerra-Herrera, Mercedes; Miranda, Valentina; Arismendi, Daniel; Richter Duk, Pablo (Elsevier B.V., 2018)© 2017 Elsevier B.V. A combination of rotating disk sorptive extraction (RDSE) using Oasis® HLB as the sorbent phase and gas chromatography mass spectrometry (GC-MS) has been performed for the determination of four of the ...
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Cañas, Alejandro; Richter Duk, Pablo; Escandar, Graciela M. (Elsevier, 2014)© 2014 Elsevier B.V. This work presents a green and very simple approach which enables the accurate and simultaneous determination of benzo[a]pyrene, dibenz[a,h]anthracene, benz[a]anthracene, and chrysene, concerned and ...
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Toral Ponce, María; Hernández, Paola; Richter Duk, Pablo (MARCEL DEKKER INC, 1996)A continuous flow injection reaction-stopped flow detection method using derivative spectrophotometry was developed for the determination of cobalt and iron in mixtures. A conventional two-channel flow injection manifold ...
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Retamal, Mauricio; Ahumada, Inés; Maricán, Adolfo; Fuentes, Edwar; Borie B., Gilda; Richter Duk, Pablo (2010)An extraction method of polycyclic aromatic hydrocarbons (PAHs) from biosolids, based on continuous pressurized solvent extraction (PSE), was developed and optimized through an experimental design and followed by gas ...
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Bustamante Araya, Ramiro; Toral Ponce, María; Richter Duk, Pablo; Serey Estay, Italo; Yates, L. R. (KLUWER ACADEMIC PUBL, 1997-05)Copper mining activities are very important in central Chile. Like other metals, copper is a nutrient for most plants at low concentration levels; however, at higher levels it may become toxic. At present, copper abundance ...
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Takazawa, Y.; Verdugo, R.; Richter Duk, Pablo; Kitamura, K.; Choi, J. W.; Hashimoto, S.; Ito, H.; Shibata, Y.; Morita, M. (SPRINGER, 2004-09)
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Jachero, Lourdes; Ahumada, Inés; Fuentes, Edwar; Richter Duk, Pablo (2016)The uptake of triclosan (TCS) and its metabolite methyl-triclosan (MTCS) by plants is poorly discussed in the current literature. The aim of this research was to analyze the extent of absorption of these compounds by the ...
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Toral Ponce, María; Lara, Nelson; Gomez, Javier; Richter Duk, Pablo (Sociedad Chilena de Quimica, 2001)A microdetermination of iron at sub-μg/L level by derivative spectrophotometry has been developed. The compound TPTZ (2, 4, 6-tripyridyl-1, 3, 5-triazine) was used as chromogenic reagent to form a blue complex (pH = 5. 0), ...
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Toral Ponce, María; Paine, Maximiliano; Leyton, Patricio; Richter Duk, Pablo (AOAC INTERNATIONAL, 2004-11)A new method for the sequential determination of attapulgite and nifuroxazide in pharmaceutical formulations by first- and second-derivative spectrophotometry, respectively, has been developed. In order to obtain the optimal ...
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Caicedo, Pamela; Schröder, Andrea; Ulrich, Nadin; Schröter, Uwe; Paschke, Albrecht; Schüürmann, Gerrit; Ahumada, Inés; Richter Duk, Pablo (2011)The leachability of lindane from different biosolid amended soils was determined and compared to its bioavailability. Sand, soil, and a mixture of soil-sand (1:1 w/w) were spiked with lindane, blended with different amounts ...
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Giordano, Ady; Richter Duk, Pablo; Ahumada, Inés (Elsevier B.V., 2011)The rotating disk sorptive extraction (RDSE) technique was applied to the determination of pesticides in aqueous samples. Pesticides of different polarities were considered in this study: chlorpyrifos, diazinon, fenvalarate, ...
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Rocco, Gabriela; Toledo, Carla; Ahumada, Inés; Sepúlveda, Betsabet; Cañete, Alvaro; 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 ...
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Giordano, A.; Richter Duk, Pablo; Leiva, K.; Ascar, L. (Sociedad Chilena de Quimica, 2013)Silicone rod extraction (SR) is a siloxane-based methodology for the extraction of organic pollutants from aqueous samples with similar principle extraction as the stir bar sorptive extraction (SBSE). In this study the SR ...
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Ahumada, Inés; Ascar, Loreto; Pedraza, Cristina; Vásquez, Viviana; Carrasco, Adriana; Richter Duk, Pablo; Brown, Sally (2011)This study assessed the effect of biosolids applied at rates, 0, 30, 45, and 60 Mg ha(-1) on the chemical associations and bioavailability of Cu and Zn in soils from an important agricultural zone of the Metropolitan Region ...
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Corrotea, Yanina; Richter Duk, Pablo; Brown, Sally; Sepúlveda, Betsabet; Ascar Estay, María Loreto; Ahumada Torres, Inés (Springer, 2016)Purpose Triclosan (TCS, 5-chloro-2-(2,4-dichlorophenoxy) phenol) an antimicrobial compound used in a range of household products, is an emerging hydrophobic organic contaminant, that may be incorporated into soil through ...
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Determination of the sum of malachite green and leucomalachite green in salmon muscle by liquid ... Valle, Luis; Díaz, Cecilia; Zanocco Loyola, Antonio; Richter Duk, Pablo (ELSEVIER SCIENCE BV, 2005-03-04)A sensitive method for the determination and confirmation of the sum of malachite green (MG) and leucomalachite green (LMG) in salmon muscle has been developed. It is based on the use of an oxidative pre-column reaction ...
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Cañas-Müller, Alejandro; Campo, Marcial del; Richter Duk, Pablo (Sociedad Chilena de Quimica, 2016)In this study, a new method for determination of triclabendazole (TCB) as its main metabolites, triclabendazole sulfoxide (TCB-SO) and triclabendazole sulfone (TCB-SO2) in animal plasma was developed. TCB is widely used ...