A sub-nanomole level electrochemical method for determination of prochloraz and its metabolites based on medical stone doped disposable electrode.
Identifieur interne : 000789 ( PubMed/Corpus ); précédent : 000788; suivant : 000790A sub-nanomole level electrochemical method for determination of prochloraz and its metabolites based on medical stone doped disposable electrode.
Auteurs : Hongbo Li ; Jing Li ; Chuantao Hou ; Shi Du ; Yanyan Ren ; Zhanjun Yang ; Qin Xu ; Xiaoya HuSource :
- Talanta [ 1873-3573 ] ; 2010.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Imidazoles.
- chemical , chemistry : Chlorophenols, Imidazoles.
- metabolism : Citrus sinensis.
- methods : Chromatography, Gas, Electrochemistry, Microscopy, Electron, Transmission.
- Calibration, Chemistry Techniques, Analytical, Electrodes, Hydrogen-Ion Concentration.
Abstract
A ultrasensitive, simple and convenient electrochemical method was firstly developed for the determination of prochloraz and its metabolites as 2,4,6-trichlorophenol (2,4,6-TCP) using nano-aperture medical stone. Compared with the undoped disposable electrode (UDE), nano-aperture medical stone doped disposable electrode (MSDDE) not only significantly enhances the oxidation peak current of 2,4,6-TCP but also lowers the oxidation overpotential, suggesting that the nano-aperture MSDDE can remarkably improve the sensitivity of 2,4,6-TCP. The experimental conditions such as pH values of buffer solution, the content of nano-aperture medical stone, accumulation potential and time were optimized for the determination of 2,4,6-TCP. At optimal conditions, the oxidation peak current is proportional to the concentration of 2,4,6-TCP over the range from 6.0 × 10(-9) to 8.0 × 10(-5)mol L(-1). Finally, this novel method was successfully employed to detect prochloraz and its metabolites in orange rind with the detection limit of 8.4 × 10(-10)mol L(-1) (0.3 ng g(-1)) and the method was validated by gas chromatography.
DOI: 10.1016/j.talanta.2010.10.002
PubMed: 21111179
Links to Exploration step
pubmed:21111179Le document en format XML
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<author><name sortKey="Li, Hongbo" sort="Li, Hongbo" uniqKey="Li H" first="Hongbo" last="Li">Hongbo Li</name>
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<author><name sortKey="Li, Jing" sort="Li, Jing" uniqKey="Li J" first="Jing" last="Li">Jing Li</name>
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<author><name sortKey="Hou, Chuantao" sort="Hou, Chuantao" uniqKey="Hou C" first="Chuantao" last="Hou">Chuantao Hou</name>
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<author><name sortKey="Du, Shi" sort="Du, Shi" uniqKey="Du S" first="Shi" last="Du">Shi Du</name>
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<author><name sortKey="Ren, Yanyan" sort="Ren, Yanyan" uniqKey="Ren Y" first="Yanyan" last="Ren">Yanyan Ren</name>
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<author><name sortKey="Yang, Zhanjun" sort="Yang, Zhanjun" uniqKey="Yang Z" first="Zhanjun" last="Yang">Zhanjun Yang</name>
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<author><name sortKey="Xu, Qin" sort="Xu, Qin" uniqKey="Xu Q" first="Qin" last="Xu">Qin Xu</name>
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<author><name sortKey="Hu, Xiaoya" sort="Hu, Xiaoya" uniqKey="Hu X" first="Xiaoya" last="Hu">Xiaoya Hu</name>
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<term>Citrus sinensis (metabolism)</term>
<term>Electrochemistry (methods)</term>
<term>Electrodes</term>
<term>Hydrogen-Ion Concentration</term>
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<front><div type="abstract" xml:lang="en">A ultrasensitive, simple and convenient electrochemical method was firstly developed for the determination of prochloraz and its metabolites as 2,4,6-trichlorophenol (2,4,6-TCP) using nano-aperture medical stone. Compared with the undoped disposable electrode (UDE), nano-aperture medical stone doped disposable electrode (MSDDE) not only significantly enhances the oxidation peak current of 2,4,6-TCP but also lowers the oxidation overpotential, suggesting that the nano-aperture MSDDE can remarkably improve the sensitivity of 2,4,6-TCP. The experimental conditions such as pH values of buffer solution, the content of nano-aperture medical stone, accumulation potential and time were optimized for the determination of 2,4,6-TCP. At optimal conditions, the oxidation peak current is proportional to the concentration of 2,4,6-TCP over the range from 6.0 × 10(-9) to 8.0 × 10(-5)mol L(-1). Finally, this novel method was successfully employed to detect prochloraz and its metabolites in orange rind with the detection limit of 8.4 × 10(-10)mol L(-1) (0.3 ng g(-1)) and the method was validated by gas chromatography.</div>
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<Abstract><AbstractText>A ultrasensitive, simple and convenient electrochemical method was firstly developed for the determination of prochloraz and its metabolites as 2,4,6-trichlorophenol (2,4,6-TCP) using nano-aperture medical stone. Compared with the undoped disposable electrode (UDE), nano-aperture medical stone doped disposable electrode (MSDDE) not only significantly enhances the oxidation peak current of 2,4,6-TCP but also lowers the oxidation overpotential, suggesting that the nano-aperture MSDDE can remarkably improve the sensitivity of 2,4,6-TCP. The experimental conditions such as pH values of buffer solution, the content of nano-aperture medical stone, accumulation potential and time were optimized for the determination of 2,4,6-TCP. At optimal conditions, the oxidation peak current is proportional to the concentration of 2,4,6-TCP over the range from 6.0 × 10(-9) to 8.0 × 10(-5)mol L(-1). Finally, this novel method was successfully employed to detect prochloraz and its metabolites in orange rind with the detection limit of 8.4 × 10(-10)mol L(-1) (0.3 ng g(-1)) and the method was validated by gas chromatography.</AbstractText>
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