Determination of Mercury Ions by Using Nano Gold Plate Electrode Based on Amino Thiol Self-assembled Film

摘要：

　　The electrochemical behaviors and sensing application of 100nm-gold plate electrode based on 6-amino-1-hexanethiol (6-AHT) self-assembled monolayer (SAM) have been investigated in this paper.The 6-AHT assembled nano gold plate electrode exhibited a nice linear potential performance of responding to Hg2+ in the range of 1.0 × 10-8-1.0× 10-6 mol/L with a slope of 42.57 mV/-pC (25℃) in Tris-HCl buffer solution (pH=5.0).No obvious interferences were observed from Na+,K+,Ba2+,Mg2+,Ca2+,and Cr3+.The detection limit can be evaluated to 8.0× 10-9 mol/L.In addition,the electrodepossessed good stability and reproducibility with a recovery rate of 96.50-103.67%,indicating that it can be used for the determination of rHg2+ content in environmental waste water samples.The sensing mechanism of 6-AHT monolayer has also been discussed by the formation of coordination structure between amino groups of the thiol molecules and the mercury ions.

关键词： Nano gold plate 6-Amino-1-hexanethiol Self-assembled monolayer Mercury ion

作者: Zhong Cao Shu Long Xiang Shi Ju-Lan Zeng Li-Xian Sun Rong-Hua Yang

作者单位: Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation,School Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation,School State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engine

会议类型: 国际会议

会议名称: the 2010 International Conference on Frontiers of Manufacturing and Design Science(第一届制造与设计科学国际会议(ICFMD 2010))

会议地点: 重庆

会议语种:英文

页码: 2553-2556

在线出版日期: 2010-12-11（万方平台首次上网日期，不代表论文的发表时间）