Highly sensitive and selective electrochemical detection of L-cysteine using nanoporous gold

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• 作者：Zhaona Liu (1)
  Huacheng Zhang (1)
  Shifeng Hou (2)
  Houyi Ma (1) hyma@sdu.edu.cn
• 关键词：Nanoporous gold (NPG) – ; L ; cysteine (CySH) – ; Cyclic voltammetry (CV) – ; Sensitive determination
• 刊名：Microchimica Acta
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：177
• 期：3-4
• 页码：427-433
• 全文大小：251.4 KB
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• 作者单位：1. Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100 China2. Department of Chemistry and Biochemistry, Montclair State University, Montclair, NJ 07043, USA
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Analytical Chemistry
  Inorganic Chemistry
  Physical Chemistry
  Characterization and Evaluation Materials
  Monitoring, Environmental Analysis and Environmental Ecotoxicology
  
• 出版者：Springer Wien
• ISSN：1436-5073

文摘

Nanoporous gold (NPG) with uniform pore sizes and ligaments was prepared by using a simple dealloying method. NPG electrodes exhibit excellent electrocatalytic activity towards the oxidation of CySH and the mechanism for the electrochemical reaction of CySH on NPG has been discussed. Interestingly, if the operating potential is fixed at 0.65 V, a strong current is observed and interferences by tryptophan and tyrosine are avoided. The calibration plot is linear in the concentration range from 1 μM to 400 μM (R2 = 0.994), and the quantification limit is as low as 50 nM. The NPG-modified electrode has good reproducibility, high sensitivity and selectivity, can be used to sense CySH in aqueous solution.