A New Dodecylsulfate Ion-Selective Sensor Based on Electrochemically Prepared Polypyrrole and PVC

✍ Scribed by Naader Alizadeh; Mortaza Mahmodian

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 88 KB
• Volume: 12
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/(sici)1521-4109(200005)12:7<509::aid-elan509>3.0.co;2-u

✦ Synopsis

Dodecylsulfate-doped polypyrrole (PPy-DS) was prepared electrochemically by anodic polymerization of pyrrole in the presence of dodecylsulfate (DS 7 ) ions in aqueous solution and used as a DS 7 sensor. The effect of polymerization conditions on the characteristics of the potential response of the sensor was also investigated. The electrode made with PVC-PPy-DS membrane, plasticized with 2-nitrophenyloctylether (o-NPOE) showed the Nernstian behavior (57.5 mV per decade over 10 75 to 7610 73 M DS 7 ) with a detection limit of 5610 76 M. The response time of the electrode is in the order of a few seconds and can be used for at least six months without any divergence. The electrode is highly selective to DS 7 ion over diverse inorganic anions.