End-Column Electrochemical Detection for Aromatic Amines with High Performance Capillary Electrophoresis

✍ Scribed by Xiaojing Huang; Tianyan You; Tao Li; Xiurong Yang; Erkang Wang

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 119 KB
• Volume: 11
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/(sici)1521-4109(199909)11:13<969::aid-elan969>3.0.co;2-k

✦ Synopsis

Electrochemical detection of ®ve species of aromatic amines at a carbon ®ber microdisk electrode after separation by capillary electrophoresis is described. Under the optimum conditions, the detection limit for 3,4-dihydroxybenzylamine, N,N-dimethylaniline, p-phenylenediamine, p-aminophenol and aniline sulfate was 0.9, 0.03, 0.075, 1.2 and 0.15 mM (SyN 3), respectively. The linear response range was 5±1000, 0.1±500, 0.5±500, 5±500 and 1±200 mM, respectively. The effect of the electrode position and buffer pH on the detection was also studied. This method is very simple, sensitive and stable for the detection of these compounds.