Electrocatalytic detection of phenolic estrogenic compounds at NiTPPS|carbon nanotube composite electrodes

Xiaoqiang Liu; Heqing Feng; Xiuhua Liu; Danny K Y Wong

doi:10.1016/j.aca.2011.01.037

Electrocatalytic detection of phenolic estrogenic compounds at NiTPPS|carbon nanotube composite electrodes

Xiaoqiang Liu, Heqing Feng, Xiuhua Liu, Danny K Y Wong^*

^*Corresponding author for this work

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

63 Citations (Scopus)

Abstract

A Ni(II)tetrakis(4-sulfonatophenyl) porphyrin (NiTPPS)|carbon nanotube composite electrode that shows strong catalytic and antifouling capability was developed to detect a series of phenolic endocrine compounds including bisphenol A, nonylphenol and ethynylestradiol. This electrode was fabricated by electropolymerizing NiTPPS complexes on a carbon nanotube-modified glassy carbon electrode. Optimized experimental parameters including a hydrodynamic potential of 0.7V for flow injection analysis (FIA) and a NiTPPS surface coverage of 2.2nmolcm^-2 (standard deviation 0.2nmolcm^-2; n=6) were obtained for detection of the endocrine disrupting compounds. The sensor responded well to all the tested compounds with limits of detection ranging from 15nmolL^-1 to 260nmolL^-1 (based on three times S/N ratio) under FIA conditions. Both carbon nanotubes and NiTPPS account for the excellent performance of the composite modified electrode.

Original language	English
Pages (from-to)	212-218
Number of pages	7
Journal	Analytica Chimica Acta
Volume	689
Issue number	2
DOIs	https://doi.org/10.1016/j.aca.2011.01.037
Publication status	Published - 18 Mar 2011

Keywords

Carbon nanotubes
Electrochemical detection
Electrochemical impedance spectroscopy
Endocrine disrupting compounds
Flow injection analysis
Ni(II)tetrakis(4-sulfonatophenyl) porphyrin

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10.1016/j.aca.2011.01.037

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title = "Electrocatalytic detection of phenolic estrogenic compounds at NiTPPS|carbon nanotube composite electrodes",

abstract = "A Ni(II)tetrakis(4-sulfonatophenyl) porphyrin (NiTPPS)|carbon nanotube composite electrode that shows strong catalytic and antifouling capability was developed to detect a series of phenolic endocrine compounds including bisphenol A, nonylphenol and ethynylestradiol. This electrode was fabricated by electropolymerizing NiTPPS complexes on a carbon nanotube-modified glassy carbon electrode. Optimized experimental parameters including a hydrodynamic potential of 0.7V for flow injection analysis (FIA) and a NiTPPS surface coverage of 2.2nmolcm-2 (standard deviation 0.2nmolcm-2; n=6) were obtained for detection of the endocrine disrupting compounds. The sensor responded well to all the tested compounds with limits of detection ranging from 15nmolL-1 to 260nmolL-1 (based on three times S/N ratio) under FIA conditions. Both carbon nanotubes and NiTPPS account for the excellent performance of the composite modified electrode.",

keywords = "Carbon nanotubes, Electrochemical detection, Electrochemical impedance spectroscopy, Endocrine disrupting compounds, Flow injection analysis, Ni(II)tetrakis(4-sulfonatophenyl) porphyrin",

author = "Xiaoqiang Liu and Heqing Feng and Xiuhua Liu and Wong, {Danny K Y}",

year = "2011",

month = mar,

day = "18",

doi = "10.1016/j.aca.2011.01.037",

language = "English",

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journal = "Analytica Chimica Acta",

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AU - Liu, Xiaoqiang

AU - Feng, Heqing

AU - Liu, Xiuhua

AU - Wong, Danny K Y

PY - 2011/3/18

Y1 - 2011/3/18

N2 - A Ni(II)tetrakis(4-sulfonatophenyl) porphyrin (NiTPPS)|carbon nanotube composite electrode that shows strong catalytic and antifouling capability was developed to detect a series of phenolic endocrine compounds including bisphenol A, nonylphenol and ethynylestradiol. This electrode was fabricated by electropolymerizing NiTPPS complexes on a carbon nanotube-modified glassy carbon electrode. Optimized experimental parameters including a hydrodynamic potential of 0.7V for flow injection analysis (FIA) and a NiTPPS surface coverage of 2.2nmolcm-2 (standard deviation 0.2nmolcm-2; n=6) were obtained for detection of the endocrine disrupting compounds. The sensor responded well to all the tested compounds with limits of detection ranging from 15nmolL-1 to 260nmolL-1 (based on three times S/N ratio) under FIA conditions. Both carbon nanotubes and NiTPPS account for the excellent performance of the composite modified electrode.

AB - A Ni(II)tetrakis(4-sulfonatophenyl) porphyrin (NiTPPS)|carbon nanotube composite electrode that shows strong catalytic and antifouling capability was developed to detect a series of phenolic endocrine compounds including bisphenol A, nonylphenol and ethynylestradiol. This electrode was fabricated by electropolymerizing NiTPPS complexes on a carbon nanotube-modified glassy carbon electrode. Optimized experimental parameters including a hydrodynamic potential of 0.7V for flow injection analysis (FIA) and a NiTPPS surface coverage of 2.2nmolcm-2 (standard deviation 0.2nmolcm-2; n=6) were obtained for detection of the endocrine disrupting compounds. The sensor responded well to all the tested compounds with limits of detection ranging from 15nmolL-1 to 260nmolL-1 (based on three times S/N ratio) under FIA conditions. Both carbon nanotubes and NiTPPS account for the excellent performance of the composite modified electrode.

KW - Carbon nanotubes

KW - Electrochemical detection

KW - Electrochemical impedance spectroscopy

KW - Endocrine disrupting compounds

KW - Flow injection analysis

KW - Ni(II)tetrakis(4-sulfonatophenyl) porphyrin

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SN - 0003-2670

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JO - Analytica Chimica Acta

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IS - 2

ER -

Electrocatalytic detection of phenolic estrogenic compounds at NiTPPS|carbon nanotube composite electrodes

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