Preconcentration and Determination of Copper(II) at a Chemically Modified Electrode Containing Salicylaldehyde Thiosemicarbazone

1997 ◽  
Vol 44 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Chin-Hung Chang ◽  
Chuen-Ying Liu
Keyword(s):  
Modified Electrode ◽  
Chemically Modified Electrode ◽  
Chemically Modified ◽  
Determination Of Copper

scholarly journals VOLTAMETRIC DETERMINATION OF Cu IN FUEL USING CHEMICALLY MODIFIED ELECTRODE BY TETRAZOLES

2019 ◽  
Vol 16 (31) ◽  
pp. 660-673
Author(s):  
Lucy Rose de Mª O MOREIRA ◽  
Janiciara Botelho SILVA ◽  
Jethânia Glasses Cutrim FURTADO ◽  
Aldaléa Lopes Brandes MARQUES ◽  
Cícero Wellington Brito BEZERRA ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Modified Electrode ◽  
Metal Ion ◽  
Limit Of Detection ◽  
Chemically Modified Electrode ◽  
Chemically Modified ◽  
Environment And Health ◽  
Certainty Level ◽  
Determination Of Copper

This article describes an analytical procedure for the determination of copper in fuel samples using the modified graphite electrode basal pyrolysis (BPPGME) by tetrazolium salts: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2Htetrazolium (MTT) Br]. The determination of metals in fuel is an issue of environmental relevance because it believes that these elements can be released into the atmosphere causing damage to the environment and health. Fuel samples (ethanol, biodiesel and gasoline) were previously digested in a microwave oven using nitric acid and peroxides (biodiesel) and only nitric acid (alcohol and gasoline). The metal ion studied reacted on the surface of the chemically modified electrode to produce marked changes in the corresponding voltammograms. In order to determine the species of interest the best results were at pH 5.0 for copper and pH 6.0 for other species. The concentration scale for copper was 2.0x10-6 at 1.25 X 10-5 mol L-1. The limit of detection in fuels of samples (ethanol, biodiesel or gasoline), by ARV was 2.5x10-6 mol L-1. The accuracy of the proposed technique was compared by providing similar results, ie the copper concentration in the samples analyzed by both techniques at a non-statistically different 95% certainty level.

Potentiometric determination of phosphorus in biodiesel using chemically modified electrode with cobalt film

Fuel ◽  
2014 ◽  
Vol 117 ◽  
pp. 564-567 ◽  
Author(s):  
Mayara C. Sartori ◽  
Tina R.C. Zezza ◽  
Leonardo L. Paim ◽  
Nelson R. Stradiotto
Keyword(s):  
Modified Electrode ◽  
Chemically Modified Electrode ◽  
Potentiometric Determination ◽  
Cobalt Film ◽  
Chemically Modified

Determination of chloride in fuel ethanol using a polyaniline-chemically modified electrode in flow injection analysis

2008 ◽  
Vol 44 (6) ◽  
pp. 435-440 ◽  
Author(s):  
Daniela Toledo de Paula ◽  
Hideko Yamanaka ◽  
Marcelo Firmino de Oliveira ◽  
Nelson Ramos Stradiotto
Keyword(s):  
Modified Electrode ◽  
Flow Injection ◽  
Flow Injection Analysis ◽  
Fuel Ethanol ◽  
Chemically Modified Electrode ◽  
Chemically Modified
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