Determination of nitrite based on mediated oxidation at a carbon paste electrode modified with a ruthenium polymer

Thomas J. O'Shea; Dónal Leech; Malcolm R. Smyth; Johannes G. Vos

doi:10.1016/0039-9140(92)80160-F

Determination of nitrite based on mediated oxidation at a carbon paste electrode modified with a ruthenium polymer

Thomas J. O'Shea, Dónal Leech, Malcolm R. Smyth, Johannes G. Vos

Dublin City University

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

26 Citations (Scopus)

Abstract

The use of carbon paste electrodes modified with [Ru(bpy)₂(PVP)₁₀Cl]Cl for the mediated detection of nitrite is described. This surface modifier substantially lowers the overpotential for nitrite oxidation, hence permitting its determination at a lower potential. Various electrode characteristics were optimized, including the modifier loading and the monitoring potential, using batch amperometry. Standard calibration curves yielded slopes of 0.30 μA/μM over the linear range 5 × 10^-8-5 × 10^-4M nitrite with a detection limit of 3 × 10^-8M (1.38 ppb) nitrite. The modified electrode response was shown to be relatively stable over a period of 5 days with a signal diminution of 8%. Electrode-to-electrode precision was measured as 11.4%. Flow-injection studies indicated the suitability of this electrode as a detector in flowing streams.

Original language	English
Pages (from-to)	443-447
Number of pages	5
Journal	Talanta
Volume	39
Issue number	4
DOIs	https://doi.org/10.1016/0039-9140(92)80160-F
Publication status	Published - Apr 1992
Externally published	Yes

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title = "Determination of nitrite based on mediated oxidation at a carbon paste electrode modified with a ruthenium polymer",

abstract = "The use of carbon paste electrodes modified with [Ru(bpy)2(PVP)10Cl]Cl for the mediated detection of nitrite is described. This surface modifier substantially lowers the overpotential for nitrite oxidation, hence permitting its determination at a lower potential. Various electrode characteristics were optimized, including the modifier loading and the monitoring potential, using batch amperometry. Standard calibration curves yielded slopes of 0.30 μA/μM over the linear range 5 × 10-8-5 × 10-4M nitrite with a detection limit of 3 × 10-8M (1.38 ppb) nitrite. The modified electrode response was shown to be relatively stable over a period of 5 days with a signal diminution of 8\%. Electrode-to-electrode precision was measured as 11.4\%. Flow-injection studies indicated the suitability of this electrode as a detector in flowing streams.",

author = "O'Shea, \{Thomas J.\} and D{\'o}nal Leech and Smyth, \{Malcolm R.\} and Vos, \{Johannes G.\}",

year = "1992",

month = apr,

doi = "10.1016/0039-9140(92)80160-F",

language = "English",

volume = "39",

pages = "443--447",

journal = "Talanta",

issn = "0039-9140",

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TY - JOUR

T1 - Determination of nitrite based on mediated oxidation at a carbon paste electrode modified with a ruthenium polymer

AU - O'Shea, Thomas J.

AU - Leech, Dónal

AU - Smyth, Malcolm R.

AU - Vos, Johannes G.

PY - 1992/4

Y1 - 1992/4

N2 - The use of carbon paste electrodes modified with [Ru(bpy)2(PVP)10Cl]Cl for the mediated detection of nitrite is described. This surface modifier substantially lowers the overpotential for nitrite oxidation, hence permitting its determination at a lower potential. Various electrode characteristics were optimized, including the modifier loading and the monitoring potential, using batch amperometry. Standard calibration curves yielded slopes of 0.30 μA/μM over the linear range 5 × 10-8-5 × 10-4M nitrite with a detection limit of 3 × 10-8M (1.38 ppb) nitrite. The modified electrode response was shown to be relatively stable over a period of 5 days with a signal diminution of 8%. Electrode-to-electrode precision was measured as 11.4%. Flow-injection studies indicated the suitability of this electrode as a detector in flowing streams.

AB - The use of carbon paste electrodes modified with [Ru(bpy)2(PVP)10Cl]Cl for the mediated detection of nitrite is described. This surface modifier substantially lowers the overpotential for nitrite oxidation, hence permitting its determination at a lower potential. Various electrode characteristics were optimized, including the modifier loading and the monitoring potential, using batch amperometry. Standard calibration curves yielded slopes of 0.30 μA/μM over the linear range 5 × 10-8-5 × 10-4M nitrite with a detection limit of 3 × 10-8M (1.38 ppb) nitrite. The modified electrode response was shown to be relatively stable over a period of 5 days with a signal diminution of 8%. Electrode-to-electrode precision was measured as 11.4%. Flow-injection studies indicated the suitability of this electrode as a detector in flowing streams.

UR - https://www.scopus.com/pages/publications/0001004713

U2 - 10.1016/0039-9140(92)80160-F

DO - 10.1016/0039-9140(92)80160-F

M3 - Article

SN - 0039-9140

VL - 39

SP - 443

EP - 447

JO - Talanta

JF - Talanta

IS - 4

ER -

Determination of nitrite based on mediated oxidation at a carbon paste electrode modified with a ruthenium polymer

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