ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

IDA Microelectrode - a Suitable Sensor for Ultra-Trace Analysis of Mercury in Water

M. Rievaj and D. Bustin

Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak University of Technology, SK-812 37 Bratislava

E-mail: rievaj@cvt.stuba.sk

Abstract: Application of interdigitated array IDA microelectrode in trace analysis of Hg in tap and environmental water was investigated. The method was tested together with two other electroanalytical techniques applying different working electrodes ("convention size" rotating disc electrode and single fibre microelectrode). The testing was done using synthetic samples spiked with known amounts of Hg(II) in inorganic Hg(ClO₄)₂ and organic Hg(C₂H₅)₂ forms in the range of its legal limiting value by the state regulations for tap and environmental water. All three tested methods proved to be suitable for Hg ultra-trace analysis on the concentration level required by the state regulations. Nevertheless, the method applying gold IDA microelectrode provided the most reliable results.

Full paper in Portable Document Format: 553a175.pdf

Chemical Papers 55 (3) 175–178 (2001)