Abstract
The tape electrode, consisting of flexible polymer substrate, covered with carbon-containing paste and modified by calomel, has been developed as an alternative to the flexible voltammetric sensor with replaceable surface, which was made of a carbon-containing filament and modified beforehand by insoluble mercury diethyldithiocarbaminate. The tape electrode was fabricated using commercially available materials and the screen-printing technology. Optimal conditions have been chosen for the electrochemical 'activation' of the modifying layer of the calomel. These conditions provided a thin mercury layer comprising microscopic droplets 1-4 {mu}m across on the electrode surface. Main experimental data obtained with the use of developed electrode followed the theoretical laws for the discharge-ionization of metals on the surface of solid and mercury thin-film electrodes. As compared to the carbon-containing filament, the tape electrode considerably extends the number of determinable amalgam-forming metals ions and allows decreasing their detection limits by more than one order of magnitude. The detection limit of 0.12 {mu}g l{sup -1} for copper, 0.02 {mu}g l{sup -1} for lead and cadmium and 0.05 {mu}g l{sup -1} for zinc was achieved after a 2 min accumulation. A high reproducibility of analytical response (0.6-2.3% R.S.D.) was achieved for nine repetitive measurements of 1 {mu}g l{sup -1}
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Citation Formats
Malakhova, N A, Miroshnikova, E G, Stojko, N Yu, and Brainina, Kh Z.
Long-lived sensors with replaceable surface for stripping voltammetric analysis: part II.
Netherlands: N. p.,
2004.
Web.
doi:10.1016/j.aca.2004.04.008.
Malakhova, N A, Miroshnikova, E G, Stojko, N Yu, & Brainina, Kh Z.
Long-lived sensors with replaceable surface for stripping voltammetric analysis: part II.
Netherlands.
https://doi.org/10.1016/j.aca.2004.04.008
Malakhova, N A, Miroshnikova, E G, Stojko, N Yu, and Brainina, Kh Z.
2004.
"Long-lived sensors with replaceable surface for stripping voltammetric analysis: part II."
Netherlands.
https://doi.org/10.1016/j.aca.2004.04.008.
@misc{etde_20620542,
title = {Long-lived sensors with replaceable surface for stripping voltammetric analysis: part II}
author = {Malakhova, N A, Miroshnikova, E G, Stojko, N Yu, and Brainina, Kh Z}
abstractNote = {The tape electrode, consisting of flexible polymer substrate, covered with carbon-containing paste and modified by calomel, has been developed as an alternative to the flexible voltammetric sensor with replaceable surface, which was made of a carbon-containing filament and modified beforehand by insoluble mercury diethyldithiocarbaminate. The tape electrode was fabricated using commercially available materials and the screen-printing technology. Optimal conditions have been chosen for the electrochemical 'activation' of the modifying layer of the calomel. These conditions provided a thin mercury layer comprising microscopic droplets 1-4 {mu}m across on the electrode surface. Main experimental data obtained with the use of developed electrode followed the theoretical laws for the discharge-ionization of metals on the surface of solid and mercury thin-film electrodes. As compared to the carbon-containing filament, the tape electrode considerably extends the number of determinable amalgam-forming metals ions and allows decreasing their detection limits by more than one order of magnitude. The detection limit of 0.12 {mu}g l{sup -1} for copper, 0.02 {mu}g l{sup -1} for lead and cadmium and 0.05 {mu}g l{sup -1} for zinc was achieved after a 2 min accumulation. A high reproducibility of analytical response (0.6-2.3% R.S.D.) was achieved for nine repetitive measurements of 1 {mu}g l{sup -1} of these metals. The response values obtained with the tape sensor were directly proportional to the concentration of the metal ions over a broad concentration interval (0.1 {mu}g l{sup -1} to 0.5 mg l{sup -1}) at different accumulation times (120-10 s). Therefore, the newly developed low-toxic sensor can be used in automatic systems for environmental monitoring (at the trace level inclusive), processing solutions and waste waters.}
doi = {10.1016/j.aca.2004.04.008}
journal = []
issue = {1-2}
volume = {516}
journal type = {AC}
place = {Netherlands}
year = {2004}
month = {Jul}
}
title = {Long-lived sensors with replaceable surface for stripping voltammetric analysis: part II}
author = {Malakhova, N A, Miroshnikova, E G, Stojko, N Yu, and Brainina, Kh Z}
abstractNote = {The tape electrode, consisting of flexible polymer substrate, covered with carbon-containing paste and modified by calomel, has been developed as an alternative to the flexible voltammetric sensor with replaceable surface, which was made of a carbon-containing filament and modified beforehand by insoluble mercury diethyldithiocarbaminate. The tape electrode was fabricated using commercially available materials and the screen-printing technology. Optimal conditions have been chosen for the electrochemical 'activation' of the modifying layer of the calomel. These conditions provided a thin mercury layer comprising microscopic droplets 1-4 {mu}m across on the electrode surface. Main experimental data obtained with the use of developed electrode followed the theoretical laws for the discharge-ionization of metals on the surface of solid and mercury thin-film electrodes. As compared to the carbon-containing filament, the tape electrode considerably extends the number of determinable amalgam-forming metals ions and allows decreasing their detection limits by more than one order of magnitude. The detection limit of 0.12 {mu}g l{sup -1} for copper, 0.02 {mu}g l{sup -1} for lead and cadmium and 0.05 {mu}g l{sup -1} for zinc was achieved after a 2 min accumulation. A high reproducibility of analytical response (0.6-2.3% R.S.D.) was achieved for nine repetitive measurements of 1 {mu}g l{sup -1} of these metals. The response values obtained with the tape sensor were directly proportional to the concentration of the metal ions over a broad concentration interval (0.1 {mu}g l{sup -1} to 0.5 mg l{sup -1}) at different accumulation times (120-10 s). Therefore, the newly developed low-toxic sensor can be used in automatic systems for environmental monitoring (at the trace level inclusive), processing solutions and waste waters.}
doi = {10.1016/j.aca.2004.04.008}
journal = []
issue = {1-2}
volume = {516}
journal type = {AC}
place = {Netherlands}
year = {2004}
month = {Jul}
}