Differential pulse voltammetric determination of trace Te(IV) at a poly(3,3′-diaminobenzidine) film modified gold electrode in flow systems

AbstractThe present work reports the critical comparison about the employment of three different supporting electrolytes (0.1 mol L−1 HClO4, 0.01 mol L−1 EDTA-Na2 + 0.06 mol L−1 NaCl + 2.0 mol L−1 HClO4 and 0.1 mol L−1 KSCN + 0.001 mol L−1 HClO4) and their instrumental and chemical optimisation for the simultaneous voltammetric determination of total mercury(II) and copper(II) in sediments and sea water at gold electrode, especially discussing the reciprocal interference problems.The differential pulse anodic stripping voltammetric (DPASV) measurements were carried out using a conventional three-electrode cell: a gold electrode (GE) as working electrode, a platinum wire and an Ag‖AgCl‖KClsat as auxiliary and reference electrodes, respectively.The analytical procedure was verified by the analysis of standard reference materials: Estuarine Sediment BCR-CRM 277, River Sediment BCR-CRM 320 and Mercury in Water NIST-SRM 1641d.Once set up on the standard reference materials, the analytical procedure was transferred and applied to sediments and sea waters sampled in a lagoon ecosystem connected with Adriatic Sea (Ravenna area, Italy).

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Differential Pulse Voltammetric Determination of Piroxicam on Lanthanide Ferric Oxide Nanoparticles-Carbon Paste Modified Electrode

Current Pharmaceutical Analysis ◽

10.2174/1573412913666170410131223 ◽

2018 ◽

Vol 14 (3) ◽

pp. 271-276 ◽

Cited By ~ 5

Author(s):

Isaac Yves Lopes de Macedo ◽

Morgana Fernandes Alecrim ◽

Luane Ferreira Garcia ◽

Aparecido Ribeiro de Souza ◽

Wallans Torres Pio dos Santos ◽

...

Keyword(s):

Modified Electrode ◽

Ferric Oxide ◽

Differential Pulse ◽

Voltammetric Determination ◽

Oxide Nanoparticles ◽

Carbon Paste ◽

Carbon Paste Modified Electrode

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Polarographic and voltammetric determination of 6-mercaptopurine and 6-thioguanine

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19862466 ◽

1986 ◽

Vol 51 (11) ◽

pp. 2466-2472 ◽

Cited By ~ 9

Author(s):

Jiří Barek ◽

Antonín Berka ◽

Ludmila Dempírová ◽

Jiří Zima

Keyword(s):

Detection Limit ◽

Differential Pulse Voltammetry ◽

Detection Limits ◽

Differential Pulse ◽

Voltammetric Determination ◽

Differential Pulse Polarography ◽

Hanging Mercury Drop Electrode ◽

Pulse Polarography ◽

Pulse Voltammetry

Conditions were found for the determination of 6-mercaptopurine (I) and 6-thioguanine (II) by TAST polarography, differential pulse polarography and fast-scan differential pulse voltammetry at a hanging mercury drop electrode. The detection limits were 10-6, 8 . 10-8, and 6 . 10-8 mol l-1, respectively. A further lowering of the detection limit to 2 . 10-8 mol l-1 was attained by preliminary accumulation of the determined substances at the surface of a hanging mercury drop.

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The voltammetric determination of 4-nitrobiphenyl

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19910595 ◽

1991 ◽

Vol 56 (3) ◽

pp. 595-601 ◽

Cited By ~ 3

Author(s):

Jiří Barek ◽

Gulamustafa Malik ◽

Jiří Zima

Keyword(s):

Differential Pulse Voltammetry ◽

Differential Pulse ◽

Voltammetric Determination ◽

Hanging Mercury Drop Electrode ◽

Optimum Conditions ◽

Mercury Drop Electrode ◽

Working Electrode ◽

Pulse Voltammetry ◽

Unstirred Solution

Optimum conditions were found for the determination of 4-nitrobiphenyl by fast scan differential pulse voltammetry at a hanging mercury drop electrode in the concentration range 1 . 10-5 to 2 . 10-7 mol l-1. A further increase in sensitivity was attained by adsorptive accumulation of this substance on the surface of the working electrode, permitting determination in the concentration range (2 – 10) . 10-8 mol l-1 with one minute accumulation of the substance in unstirred solution or (2 – 10) . 10-9 mol l-1 with three-minute accumulation in stirred solution. Linear scan voltammetry can be used to determine 4-nitrobiphenyl in the concentration range (2 – 10) . 10-9 mol l-1 with five-minute accumulation in stirred solution, with the advantage of a smoother baseline and smaller interference from substances that yield only tensametric peaks.

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