Browsing by Title Artículos de revistas
Now showing items 682-701 of 2801
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(Sociedad Chilena de Quimica, 2013)As (III) was determined by differential pulse polarography (DPP) in 1 mol L-1 HCl as supporting electrolyte. For quantification, the -0.35 V peak (versus Ag/AgCl) was chosen. The obtained detection and quantification limits ...
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(SOCIEDAD CHILENA DE QUIMICA, 2003-03)A high performance thin layer chromatography (HPTLC) method for the determination of atrazine in aqueous soil extracts was studied. To verify the applicability of the method in environmental concern studies, soil samples ...
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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 ...
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(MDPI, 2021)Consumers' interest in foods that are nutritionally balanced and with health benefits has increased. The food industry is paying attention to the use of the ancestral seed Salvia hispanica L., commonly known as chia. At ...
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(2002)Thermal decomposition of 1,4-dimethylnaphthalene endoperoxide (DMNE) as a source of singlet oxygen was used to measure chemical rate constants, k(R), for reactions between singlet oxygen, O-2((1)Delta(g)), and various ...
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(2011)This work forms part of an investigation which seeks to determine metal complexes in a solid phase by photoacoustic spectrometry (PAS). Results of spectral determination of Co(II) complexes are introduced. The method is ...
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(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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(Wiley-VCH Verlag, 2014)© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.The assessment of the environmental fate of glyphosate and its degradation product (aminomethylphosphonic acid) is of great interest given the widespread use of the herbicide. ...
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(2013)Seven heavy polycyclic aromatic hydrocarbons (PAHs) of concern on the US Environmental Protection Agency priority pollutant list (benzo[a]anthracene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, dibenz[a,h ...
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(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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(Elsevier, 2015)This paper presents a new method for the determination of imidacloprid in water samples; one of the most widely used neonicotinoid pesticides in the farming industry. The method is based on the measurement of excitation-emission ...
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(Elsevier, 2015)© 2014 Elsevier B.V. All rights reserved. This paper presents a new method for the determination of imidacloprid in water samples; one of the most widely used neonicotinoid pesticides in the farming industry. The method ...
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(ELSEVIER SCIENCE BV, 2008-05-30)An adsorptive stripping voltammetry method for the determination of iron has been developed. The procedure is based on the adsorptive collection of a complex of iron with 1-(2-piridylazo)-2-naphthol (PAN) on a bismuth-coated ...
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(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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(Sociedad Chilena de Quimica, 2009)Low molecular weight carbohydrates (LMW) were determined in a Chilean Cabernet Sauvignon red wine by the Dubois method, a specific method for the determination of carbohydrates. Dialysis treatment of red wine allowed the ...
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(The Williams & Wilkins Co., 1972)When the maximum complexing ability (MCA) of water-soluble complexants of unknown molecular weight is known, it is possible to calculate the stability constants of metal complexes where these complexants participate (2,4,5). ...
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(Wiley, 2012)A new, sensitive, reproducible and easy-to-use flow-injection method for determining nifuroxazide based on adsorptive stripping linear sweep voltammetry over screen-printed carbon electrodes is presented. The presented ...
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(Ministerio de Educación Superior, 2003)Nitrate concentration in drinking water was directly determined by employing an ion selective liquid membrane electrode (ISE). This was constructed with poly(vynil chloride) as matrix on a solid conducting support. ...
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(WILEY-V C H VERLAG GMBH, 2002-04)Carbon paste electrodes modified with beta-cyclodextrin have been investigated for voltammetric determination of nitrendipine. The immobilization of the beta-cyclodextrin on the carbon paste leads to a modification of the ...
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(2002)Carbon paste electrodes modified with β-cyclodextrin have been investigated for voltammetric determination of nitrendipine. The immobilization of the β-cyclodextrin on the carbon paste leads to a modification of the electrode ...