| 聚苯胺修饰碳纤维针型复合微pH传感器 |
| |
| 引用本文： | 蔡沛祥,张润建,朱芳,邱灿辉.聚苯胺修饰碳纤维针型复合微pH传感器[J].分析化学,1997(11). |
| |
| 作者姓名： | 蔡沛祥 张润建 朱芳 邱灿辉 |
| |
| 作者单位： | 中山大学化学系!广州510275 |
| |
| 摘 要： | 由电聚合法用聚苯胺修饰碳纤维电极作为ＰＨ敏感电极。把Ｋ３Ｆｅ（ＣＮ）６／Ｋ４Ｆｅ（ＣＮ）６体系填入医用注射针头内成为参比电极。把经聚苯胺修饰的碳纤维电极安置入该针型参比电极内构成复合针型微ｐＨ传感器。在ＰＨ ２～１２范围内，该传感器呈现超Ｎｅｒｎｓｔ响应，斜率为－７８ ｍＶ／ｐＨ；响应时间<１ｍｉｎ。该传感器成功地应用于在体ｐＨ测定以及水果内微区ｐＨ测定。
|
| 关 键 词： | 针型复合pH传感器 聚苯胺 碳纤维微电极 化学修饰电极 |
A Micro Needle-Concentric pH Sensor Based on Polyaniline-Modified Carbon Fibre |
| |
| Cai Peixiang,Zhang Runjian,Zhu Fang,Qiu Canhui.A Micro Needle-Concentric pH Sensor Based on Polyaniline-Modified Carbon Fibre[J].Chinese Journal of Analytical Chemistry,1997(11). |
| |
| Authors: | Cai Peixiang Zhang Runjian Zhu Fang Qiu Canhui |
| |
| Abstract: | A Carbon fibre electrode modified with polyaniline by electro-polymerization was prepared to work as pH-sensitive electrode. A syringe needle filled with K3Fe(CN )6/ K4Fe(CN)6 redox system was used as reference electrode. The micro needle-concentric pH sensor was constructed by inserting the polyaniline-modified carbon fibre electrode in the needle reference electrode obtained above. The sensor shows a over-Nernst response in the pH range of 2-12 with a slope of -78 mV/pH and a response time of less than 1 min. The sensor has been successfully employed to determine pH in vivo and in micro region of fruit. |
| |
| Keywords: | Needle-concentric pH sensor polyaniline carbon fibre electrode chemically modified electrode |
| 本文献已被 CNKI 等数据库收录！ |
