Highly selective and sensitive determination of silver(I) at a poly(8-mercaptoquinoline) film modified glassy carbon electrode

Si Xuan Guo; Soo Beng Khoo

doi:10.1002/(SICI)1521-4109(199908)11:12<891::AID-ELAN891>3.0.CO;2-9

Highly selective and sensitive determination of silver(I) at a poly(8-mercaptoquinoline) film modified glassy carbon electrode

Si Xuan Guo, Soo Beng Khoo

Research output: Contribution to journal › Article › Research › peer-review

29 Citations (Scopus)

Abstract

8-Mercaptoquinoline was found to be electropolymerizable by a cathodic process at a glassy carbon electrode. The resulting modified electrode could be used for selective open circuit preconcentration of Ag(I). This, followed by medium exchange and anodic stripping analysis provided a highly selective and sensitive method for Ag(I) determination. Optimized procedures for both batch and flow analysis were developed. For batch determination, a detection limit of 2.7 × 10^-11 M Ag(I) was achieved (S/N = 3, 10 min preconcentration). The relative standard deviations (n = 11) for 1.00 × 10^-9 M and 2.00 × 10^-10 M Ag(I) were 2.60% and 4.74%, respectively. Similar results were observed for flow analysis. Of 44 selected potential interferents studied, only Au(III) interfered.

Original language	English
Pages (from-to)	891-898
Number of pages	8
Journal	Electroanalysis
Volume	11
Issue number	12
DOIs	https://doi.org/10.1002/(SICI)1521-4109(199908)11:12<891::AID-ELAN891>3.0.CO;2-9
Publication status	Published - Aug 1999
Externally published	Yes

Keywords

8-Mercaptoquinoline
Batch and flow analysis
Electropolymerization
Modified glassy carbon electrode
Nonelectrolytic preconcentration
Stripping analysis

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10.1002/(SICI)1521-4109(199908)11:12<891::AID-ELAN891>3.0.CO;2-9

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title = "Highly selective and sensitive determination of silver(I) at a poly(8-mercaptoquinoline) film modified glassy carbon electrode",

abstract = "8-Mercaptoquinoline was found to be electropolymerizable by a cathodic process at a glassy carbon electrode. The resulting modified electrode could be used for selective open circuit preconcentration of Ag(I). This, followed by medium exchange and anodic stripping analysis provided a highly selective and sensitive method for Ag(I) determination. Optimized procedures for both batch and flow analysis were developed. For batch determination, a detection limit of 2.7 × 10-11 M Ag(I) was achieved (S/N = 3, 10 min preconcentration). The relative standard deviations (n = 11) for 1.00 × 10-9 M and 2.00 × 10-10 M Ag(I) were 2.60\% and 4.74\%, respectively. Similar results were observed for flow analysis. Of 44 selected potential interferents studied, only Au(III) interfered.",

keywords = "8-Mercaptoquinoline, Batch and flow analysis, Electropolymerization, Modified glassy carbon electrode, Nonelectrolytic preconcentration, Stripping analysis",

author = "Guo, \{Si Xuan\} and Khoo, \{Soo Beng\}",

year = "1999",

month = aug,

doi = "10.1002/(SICI)1521-4109(199908)11:12<891::AID-ELAN891>3.0.CO;2-9",

language = "English",

volume = "11",

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journal = "Electroanalysis",

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TY - JOUR

T1 - Highly selective and sensitive determination of silver(I) at a poly(8-mercaptoquinoline) film modified glassy carbon electrode

AU - Guo, Si Xuan

AU - Khoo, Soo Beng

PY - 1999/8

Y1 - 1999/8

N2 - 8-Mercaptoquinoline was found to be electropolymerizable by a cathodic process at a glassy carbon electrode. The resulting modified electrode could be used for selective open circuit preconcentration of Ag(I). This, followed by medium exchange and anodic stripping analysis provided a highly selective and sensitive method for Ag(I) determination. Optimized procedures for both batch and flow analysis were developed. For batch determination, a detection limit of 2.7 × 10-11 M Ag(I) was achieved (S/N = 3, 10 min preconcentration). The relative standard deviations (n = 11) for 1.00 × 10-9 M and 2.00 × 10-10 M Ag(I) were 2.60% and 4.74%, respectively. Similar results were observed for flow analysis. Of 44 selected potential interferents studied, only Au(III) interfered.

AB - 8-Mercaptoquinoline was found to be electropolymerizable by a cathodic process at a glassy carbon electrode. The resulting modified electrode could be used for selective open circuit preconcentration of Ag(I). This, followed by medium exchange and anodic stripping analysis provided a highly selective and sensitive method for Ag(I) determination. Optimized procedures for both batch and flow analysis were developed. For batch determination, a detection limit of 2.7 × 10-11 M Ag(I) was achieved (S/N = 3, 10 min preconcentration). The relative standard deviations (n = 11) for 1.00 × 10-9 M and 2.00 × 10-10 M Ag(I) were 2.60% and 4.74%, respectively. Similar results were observed for flow analysis. Of 44 selected potential interferents studied, only Au(III) interfered.

KW - 8-Mercaptoquinoline

KW - Batch and flow analysis

KW - Electropolymerization

KW - Modified glassy carbon electrode

KW - Nonelectrolytic preconcentration

KW - Stripping analysis

UR - https://www.scopus.com/pages/publications/0000077724

U2 - 10.1002/(SICI)1521-4109(199908)11:12<891::AID-ELAN891>3.0.CO;2-9

DO - 10.1002/(SICI)1521-4109(199908)11:12<891::AID-ELAN891>3.0.CO;2-9

M3 - Article

AN - SCOPUS:0000077724

SN - 1040-0397

VL - 11

SP - 891

EP - 898

JO - Electroanalysis

JF - Electroanalysis

IS - 12

ER -

Highly selective and sensitive determination of silver(I) at a poly(8-mercaptoquinoline) film modified glassy carbon electrode

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Keywords

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