Ion Selective Electrodes
Mostrando 1-12 de 47 artigos, teses e dissertações.
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1. Polímeros impressos com íons: fundamentos, estratégias de preparo e aplicações em química analítica
Chemical imprinting technology has been widely used as a valuable tool in selective recognition of a given target analyte (molecule or metal ion), yielding a notable advance in the development of new analytical protocols. Since their discovery, molecularly imprinted polymers (MIPs) have been extensively studied with excellent reviews published. However, stud
Quím. Nova. Publicado em: 2013
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2. ANTIMICROBIAIS SULFAMETOXAZOL E TRIMETOPRIMA EM EFLUENTE HOSPITALAR: DETERMINAÇÃO, DEGRADAÇÃO ATRAVÉS DE ELETROCOAGULAÇÃO E IDENTIFICAÇÃO DE SUBPRODUTOS E METABÓLITOS / SULPHAMETHOXAZOLE AND TRIMETHOPRIM ANTIMICROBIALS IN HOSPITAL WASTEWATER: DETERMINATION, DEGRADATION THROUGH ELECTROCOAGULATION AND IDENTIFICATION OF BYBPRODUCTS AND METABOLITES
In this study, it was developed a methodology using liquid chromatography coupled to tandem mass spectrometry for the determination of antimicrobials sulphamethoxazole and trimethoprim in hospital effluent and for monitoring the electrocoagulation process applied to synthetic solutions, as well as, to the hospital effluent fortified with the antimicrobials,
Publicado em: 2009
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3. Estudo da capacidade de complexação e sua relação com algumas variáveis ambientais em cinco represas do Rio Tietê/Brasil
The copper and cadmium complexation properties in natural sediment suspensions of reservoirs of the Tietê River were studied using the solid membrane copper and cadmium ion-selective electrodes. The complexation and the average conditional stability constants were determined under equilibrium conditions at pH=6.00 ± 0.05 in a medium of 1.0 mol L-1 sodium n
Química Nova. Publicado em: 2007
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4. Recentes avanços e novas perspectivas dos eletrodos íon-seletivos
This paper describes the recent progress in the development of polymeric membranes for ion-selective electrodes. The importance of knowing the mechanism of potential development in membranes for ion-selective electrodes to reach lower detection limits and improve selectivity are discussed. Recent advances and future trends of research on ion-selective electr
Química Nova. Publicado em: 2006-10
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5. Desenvolvimento de eletrodos ion-seletivos : aplicação em sistema de detecção em FIA e estrategias para a melhoria do limite de detecção / Development of ion-selective electrodes: application in detection system of FIA and strategies for the improvement of detection limit
The present work describes the development of ion-selective electrodes for calcium, potassium, sodium and chloride to be employed in flow injection analyses and its application for the simultaneous determination in samples, as well as, the development of solid contact ionselective electrodes with detection limit in the nanomolar range. The preparation of ion
Publicado em: 2005
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6. Eletrodos íon-seletivos: histórico, mecanismo de resposta, seletividade e revisão dos conceitos
This paper presents a review of the concepts involved in the working mechanism of the ion-selective electrodes, searching a historical overview, moreover to describe the new advances in the area.
Química Nova. Publicado em: 2001-02
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7. Simultaneous determination of chloride and potassium in carbohydrate electrolyte beverages using an array of ion-selective electrodes controlled by a microcomputer
Este trabalho descreve a elaboração de um sistema potenciométrico controlado por microcomputador para uso com um conjunto de eletrodos íon-seletivo. O sistema empregou uma placa de interface modelo ACL-8111 da ADLink Technology, para controlar a seleção dos eletrodos íon-seletivo, através de uma chave analógica (ADG201), com simultânea aquisição
Journal of the Brazilian Chemical Society. Publicado em: 2000-08
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8. Isolamento, purificação e estudos de complexação de substâncias húmicas / Isolation, purification and complexation studies of humic substances
The aim of the present work was to study the humic substances, with emphasis to the humic acid (HA) fraction isolated from sediments of the Tietê River, collected at the Barra Bonita reservoir. The extraction of the humic acid was performed according to the procedure proposed by the International Humic Substances Society (I.H.S.S.). A commercial humic acid
Publicado em: 1998
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9. Construção e avaliação de eletrodos seletivos ao antibiotico tiamulina
The antibiotic tiamulin hydrogen fumarate can be assayed by using ion-selective electrodes. These electrodes can be made with membranes of PVC or ethylene/vinyl acetate copolymer (EVA) with the ionic pairs tiamulin tetraphenylborate and tiamulin phosphotungstate. Most of the ion-selective electrodes prepared showed nernstian response in the range from 1,0 x
Publicado em: 1995
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10. Construction and evolution copperand silver ion selective electrode based on crystalline solid membranes / Construção e avaliação de eletrodos de membrana sólida cristalina seletivos a cobre e prata
O presente trabalho visou a construção e avaliação de eletrodos de membrana sólida cristalina seletivos a cobre e prata. Obteve-se o sulfeto de prata, material eletroativo usado na preparação de membranas seletivas a íons Ag+, por precipitação com gás sulfídrico em meio ácido. Eletrodos com membranas de 1,0 e 0,50 mm de espessura apresentaram re
Publicado em: 1988
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11. Free magnesium in sheep, ferret and frog striated muscle at rest measured with ion-selective micro-electrodes
1. Neutral carrier-based liquid membrane micro-electrodes were constructed which are suitable for continuous measurements of [Mg2+]i in cardiac and skeletal muscle preparations.
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12. Distribution of chloride and potassium in cellular and luminal compartments of control and drug-treated turtle thyroid.
Chloride and potassium activities inside the lumen and the transepithelial potentials of control and drug-treated turtle thyroid follicles were determined simultaneously by ion-selective and conventional 3 M-KCl micro-electrodes, respectively. Water and electrolyte contents of these thyroid tissues were determined chemically after each experiment. Cellular a