[PDF] Top 20 Voltammetric determination of glyphosate in natural waters with a copper electrode.
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Voltammetric determination of glyphosate in natural waters with a copper electrode.
... Uma das maiores causas da contaminação de águas superfici- ais e subterrâneas atualmente é, sem dúvida, o uso de pesticidas na atividade agrícola. Esta contaminação resulta da ação das águas da chuva e de irrigação que ... See full document
5
Determination of low levels of copper in natural waters by flame atomic absorption spectrometry using a SIA system with a poly(ethylenimine) column.
... DETERMINATION OF LOW LEVELS OF COPPER IN NATURAL WATERS BY FLAME ATOMIC ABSORPTION SPECTROMETRY USING A SIA SYSTEM WITH A POLY(ETHYLENIMINE) ...the ... See full document
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J. Braz. Chem. Soc. vol.23 número9
... directly in the sugar cane spirit sample or standard solution containing 50% ethanol, (ii) squarewave voltammogram registered with anodic stripping, and (iii) surface regeneration of the ... See full document
9
Voltammetric determination of metals in waters and biological fluids using sample mineralization with ultraviolet radiation.
... VOLTAMMETRIC DETERMINATION OF METALS IN WATERS AND BIOLOGICAL FLUIDS USING SAMPLE MINERALIZATION WITH ULTRAVIOLET ...optimization of pretreatment steps for the destruction ... See full document
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Repositório Institucional da UFPA: Square-wave voltammetric determination of rutin in pharmaceutical formulations using a carbon composite electrode modified with copper (II) phosphate immobilized in polyester resin
... ity of electrochemical analysis can be enhanced using chemically modified electrodes (CMEs) (Pereira et ...lot of attention due to the possibility of modifying the electrode surface including ... See full document
11
J. Braz. Chem. Soc. vol.19 número5
... aim of this work was to develop a simple, selective and sensitive system for determination of Cu(II) by stripping voltammetry on platinum electrode modified with overoxidized PPy (OPPy) ... See full document
7
Glyphosate Determination in Soil, Water and Vegetables Using DPV Optimized by Response Surface Methodology
... The glyphosate molecule presents in its structure a secondary amino group that, when treated with nitrous acid, is converted to an N-nitro group ...its determination by voltammetric ... See full document
13
DEVELOPMENT OF SAMPLING FOR QUANTIFICATION OF GLYPHOSATE IN NATURAL WATERS
... 2002b). Glyphosate is a polar and low-observable compound (HOGENDOORN et ...residues of glyphosate in natural water by nitrosation and differential pulse ...found glyphosate by ... See full document
7
Cost-effective composite electrode for the fast voltammetric screening and determination of riboflavin (B2) and pyridoxine (B6) in pharmaceuticals
... working electrode consisted of different proportions between graphite particles and paraffin (from 65 to 80% m/m) solid dispersion, prepared as previously described in Perantoni et ...41 In ... See full document
15
Anodic stripping voltammetric determination of copper (II) in wastewaters using a carbon paste electrode modified with chitosan.
... Finalmente, utilizando voltametria de redissolução anódica em um intervalo de potencial de –0,2 a 0,5 V, a uma velo- cidade de varredura de potencial de 25 mV s -1 , ocorre a oxidação de[r] ... See full document
5
J. Braz. Chem. Soc. vol.19 número4
... adsorption of TRF on chitosan was spectro- photometrically investigated and results showed eletrostatic interaction between the ammonium group of chitosan and the negative dipole of the substituent ... See full document
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Voltammetric study of complex of copper (II) with alizarin red S ligand, absorbed on surface of pyrolytic graphite electrode.
... STUDY OF COMPLEX OF COPPER(II) WITH ALIZARIN RED S LIGAND, ADSORBED ON SURFACE OF PYROLYTIC GRAPHITE ...reagent of several metals for a long ...agent of electrodes, for ... See full document
4
J. Braz. Chem. Soc. vol.18 número1
... paste electrode modified with Rupic complex was considerably ...This electrode is simple, ease to prepare and renew its ...behavior of Rupic incorporated in the carbon paste was ... See full document
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Adsorptive Stripping Voltammetric Determination of Hydroquinone using an Electrochemically Pretreated Glassy Carbon Electrode
... stripping voltammetric (AdSV) method was developed for the determination of hydroquinone at an electrochemically pretreated glassy carbon (GC) electrode in waste ...GC electrode ... See full document
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J. Braz. Chem. Soc. vol.14 número2
... voltammetric determination of pyridoxine in pharma- ceutical preparations containing vitamins and other concomitants with good sensitivity and ...voltammograms of the modified ... See full document
6
Fabrication Of Gold Nanoparticles-Modified Glassy Carbon Electrode And Its Application For Voltammetric Detection Of CrIII
... 2.3 Electrode fabrication with AuNPs modification The procedure for fabrication of GCE modified with AuNPs was adapted from previously published reports [31] with some ...surface ... See full document
5
J. Braz. Chem. Soc. vol.20 número3
... carbon electrode presents a great potential for the analysis of PN in real ...results of the present method are not very different from other works devoted to determination of PN ... See full document
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Voltammetric characteristics of miconazole and its cathodic stripping voltammetric determination
... Miconazole, 1-[2-(2,4-diclorofenil)-2-(2,4-dicloro- fenil)metoxietil-1H-imidazol, is an imidazole anti- fungal agent and antibacterial drug (Bennett 1996, Hoogeheide and Wycka 1982). The drug is ad- ministered locally or ... See full document
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J. Braz. Chem. Soc. vol.11 número2
... plication of FIA coupled to a potentiometric sensor for L- ascorbic determination that combines the selectivity of the sensor with the speed of the technique has not been re- ...acid ... See full document
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Direct Potentiometric Determination of Penicillamine in Real Samples by Using Copper ISE
... method of linear re- gression. It can be seen that copper ISE shows linear de- pendence with changing of Pen concentration in the concentration range between ... See full document
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