Browsing by Author "XX568890"
Now showing items 1-20 of 100
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(Elsevier B.V., 2019)In this study, a novel environmentally-friendly approach was developed to overcome certain limitations in the analysis of solid food samples. An experimental setup based on solid-phase microextraction apparatus coupled to ...
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(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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(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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(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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(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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(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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(1996)A flow injection analysis (FIA)/stopped flow method is proposed for the simultaneous determination of copper and zinc. The method is based in the difference in the reaction rates between the analytes and the reagent zincon ...
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(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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(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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(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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(SPRINGER, 2004-09)
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(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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(Kluwer Academic Publishers, 1995)A simple, sensitive and selective method by solvent extraction-first derivative spectrophotometry is described for the determination of microamounts of copper in water by means of its reaction and extraction at pH 8.0 with ...
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(Universidad de Chile, 2013-03)Los hidrocarburos aromáticos policíclicos (PAHs), generados por combustión incompleta de materia orgánica, presentan particular interés debido a sus características cancerígenas y/o mutagénicas. Para el ser humano una de ...
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(Universidad de ChileCyberDocs, 2011)En este trabajo se desarrolló una metodología analítica empleando la cromatografía gaseosa acoplada a un detector masa-masa (GC-MS/MS) la cual permite la determinación simultánea de 68 contaminantes orgánicos para las ...
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(Universidad de Chile, 2011)Los lodos provenientes de plantas de tratamiento de aguas residuales, por sus características, pueden ser reutilizados en la agricultura, como mejoradores de suelos o reemplazo parcial de fertilizantes. Se caracterizan ...
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(John Wiley and Sons Ltd, 2019)Inorganic polymers in aqueous solutions are being proposed as essential components in new theories concerning nonclassical nucleation and growth of nanominerals relevant to environmental nanogeosciences. The study of those ...
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(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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(1996)A simple first derivative spectrophotometric method has been developed for the simultaneous determination of paracetamol and codeine in pharmaceutical formulations. Dimethylformamide was used as solvent for extracting the ...
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(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 ...
