Voltammetric behavior and trace determination of cadmium at a calixarene modified screen-printed carbon electrode

Honeychurch, K. C.; Hart, J. P.; Cowell, D. C.; Arrigan, D. W.M.; Honeychurch, Kevin C.; Hawkins, Daniel M.; Hart, John P.; Cowell, David C.

Abstract

Screen-printed carbon electrodes (SPCEs) have been evaluated for the anodic stripping voltammetric determination of cadmium using open circuit accumulation facilitated by two different calixarenes: a novel thiolated calixarene, calixarene (I), (5,11,17,23, tetra-tert-butyl-25,26,27,28-tetrakis(2-mercaptoethoxy)- calix[4]arene), and a commercially available calixarene (II) (25,26,27,28-tetrahydroxyl-calix[4]arene). This approach has the advantage that the medium exchange technique can be applied to reduce the possibility of potential electroactive interferents. In the present method, following medium exchange to a clean electrolyte, differential pulse voltammetry was employed in the measurement. This combination resulted in a detection limit of 2.8 ngmL-1 and a linear calibration range up to 350 ngmL-1 Cd2+. There was no interference from Cr3+, Hg2+ and Zn2+, but a decrease in signal was obversed when Pb2+ and Cu2+ were present. The screen-printed sensor modified with calixarene (I) was successfully employed for the determination of Cd2+ in a spiked river water sample.

• Journal Article Type: Article
• Publication Date: Jan 1, 2002
• Journal: Electroanalysis
• Print ISSN: 1040-0397
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 14
• Issue: 3
• Pages: 177-185
• DOI: https://doi.org/10.1002/1521-4109%28200202%2914%3A3%3C177%3A%3AAID-ELAN177%3E3.0.CO%3B2-V
• Keywords: screen-printed carbon electrode, calixarene, differential pulse anodic stripping voltammetry, cadmium, chemically modified electrodes
• Public URL: https://uwe-repository.worktribe.com/output/1091210
• Publisher URL: http://dx.doi.org/10.1002/1521-4109(200202)14:33.0.CO;2-V