On-Line Analysis of Mercury by Sequential Injection Stripping Analysis (SISA) Using a Chemically Modified Electrode

✍ Scribed by Iva Turyan; Thomas Erichsen; Wolfgang Schuhmann; Daniel Mandler

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 84 KB
• Volume: 13
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/1521-4109(200101)13:1<79::aid-elan79>3.0.co;2-4

✦ Synopsis

A highly ¯exible, automatic sequential-injection stripping analysis (SISA) system has been developed and applied for monitoring the levels of mercury in aqueous solutions using a chemically modi®ed electrode. The preparation of the modi®ed electrode comprises spin coating of an ethanolic solution of poly(4-vinylpyridine) and Krypto®x-222 onto a glassy carbon electrode (GCE) followed by cross-linking the polymer. The analysis is based on the anodic stripping voltammetry of mercury using differential pulse voltammetry. A sequence of 36 operations was needed to complete a full cycle of cleaning, calibration and analysis.