Chemically surface-modified carbon nanoparticle carrier for phenolic pollutants : Extraction and electrochemical determination of benzophenone-3 and triclosan
Vidal, Lorena ; Chisvert, Alberto ; Canals, Antonio ; Psillakis, Elefteria ; Lapkin, Alexei ; Acosta, Fernando ; Edler, Karen J. LU
; Holdaway, James A.
LU
and Marken, Frank
(2008)
In Analytica Chimica Acta
616(1).
p.28-35
- Abstract
Chemically surface-modified (tosyl-functionalized) carbon nanoparticles (Emperor 2000 from Cabot Corp.) are employed for the extraction and electrochemical determination of phenolic impurities such as benzophenone-3 (2-hydroxy-4-methoxybenzophenone) or triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol). The hydrophilic carbon nanoparticles are readily suspended and separated by centrifugation prior to deposition onto suitable electrode surfaces and voltammetric analysis. Voltammetric peaks provide concentration information over a 10-100 μM range and an estimated limit of detection of ca. 10 μM (or 2.3 ppm) for benzophenone-3 and ca. 20 μM (or 5.8 ppm) for triclosan. Alternatively, analyte-free carbon nanoparticles immobilized at a... (More)
Chemically surface-modified (tosyl-functionalized) carbon nanoparticles (Emperor 2000 from Cabot Corp.) are employed for the extraction and electrochemical determination of phenolic impurities such as benzophenone-3 (2-hydroxy-4-methoxybenzophenone) or triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol). The hydrophilic carbon nanoparticles are readily suspended and separated by centrifugation prior to deposition onto suitable electrode surfaces and voltammetric analysis. Voltammetric peaks provide concentration information over a 10-100 μM range and an estimated limit of detection of ca. 10 μM (or 2.3 ppm) for benzophenone-3 and ca. 20 μM (or 5.8 ppm) for triclosan. Alternatively, analyte-free carbon nanoparticles immobilized at a graphite or glassy carbon electrode surface and directly immersed in analyte solution bind benzophenone-3 and triclosan (both with an estimated Langmuirian binding constants of K ≈ 6000 mol-1 dm3 at pH 9.5) and they also give characteristic voltammetric responses (anodic for triclosan and cathodic for benzophenone-3) with a linear range of ca. 1-120 μM. The estimated limit of detection is improved to ca.5 μM (or 1.2 ppm) for benzophenone-3 and ca. 10 μM (or 2.3 ppm) for triclosan. Surface functionalization is discussed as the key to further improvements in extraction and detection efficiency.
(Less)
- author
- Vidal, Lorena
; Chisvert, Alberto
; Canals, Antonio
; Psillakis, Elefteria
; Lapkin, Alexei
; Acosta, Fernando
; Edler, Karen J.
LU
; Holdaway, James A.
LU
and Marken, Frank
- organization
- publishing date
- 2008-05-26
- type
- Contribution to journal
- publication status
- published
- keywords
- Benzophenone-3, Biocide, Carbon nanoparticle, Extraction, Fungicide, Sensor, Triclosan, UV filter, Voltammetry
- in
- Analytica Chimica Acta
- volume
- 616
- issue
- 1
- pages
- 8 pages
- publisher
- Elsevier
- external identifiers
-
- pmid:18471480
- scopus:42749089217
- ISSN
- 0003-2670
- DOI
- 10.1016/j.aca.2008.04.011
- language
- English
- LU publication?
- yes
- id
- df3792da-70d0-4090-a729-21eb19cccaae
- date added to LUP
- 2023-05-04 18:50:39
- date last changed
- 2024-04-19 22:31:14
@article{df3792da-70d0-4090-a729-21eb19cccaae,
abstract = {{<p>Chemically surface-modified (tosyl-functionalized) carbon nanoparticles (Emperor 2000 from Cabot Corp.) are employed for the extraction and electrochemical determination of phenolic impurities such as benzophenone-3 (2-hydroxy-4-methoxybenzophenone) or triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol). The hydrophilic carbon nanoparticles are readily suspended and separated by centrifugation prior to deposition onto suitable electrode surfaces and voltammetric analysis. Voltammetric peaks provide concentration information over a 10-100 μM range and an estimated limit of detection of ca. 10 μM (or 2.3 ppm) for benzophenone-3 and ca. 20 μM (or 5.8 ppm) for triclosan. Alternatively, analyte-free carbon nanoparticles immobilized at a graphite or glassy carbon electrode surface and directly immersed in analyte solution bind benzophenone-3 and triclosan (both with an estimated Langmuirian binding constants of K ≈ 6000 mol<sup>-1</sup> dm<sup>3</sup> at pH 9.5) and they also give characteristic voltammetric responses (anodic for triclosan and cathodic for benzophenone-3) with a linear range of ca. 1-120 μM. The estimated limit of detection is improved to ca.5 μM (or 1.2 ppm) for benzophenone-3 and ca. 10 μM (or 2.3 ppm) for triclosan. Surface functionalization is discussed as the key to further improvements in extraction and detection efficiency.</p>}},
author = {{Vidal, Lorena and Chisvert, Alberto and Canals, Antonio and Psillakis, Elefteria and Lapkin, Alexei and Acosta, Fernando and Edler, Karen J. and Holdaway, James A. and Marken, Frank}},
issn = {{0003-2670}},
keywords = {{Benzophenone-3; Biocide; Carbon nanoparticle; Extraction; Fungicide; Sensor; Triclosan; UV filter; Voltammetry}},
language = {{eng}},
month = {{05}},
number = {{1}},
pages = {{28--35}},
publisher = {{Elsevier}},
series = {{Analytica Chimica Acta}},
title = {{Chemically surface-modified carbon nanoparticle carrier for phenolic pollutants : Extraction and electrochemical determination of benzophenone-3 and triclosan}},
url = {{http://dx.doi.org/10.1016/j.aca.2008.04.011}},
doi = {{10.1016/j.aca.2008.04.011}},
volume = {{616}},
year = {{2008}},
}