Remote Electrochemical Sensor for Monitoring Trace Mercury

✍ Scribed by Joseph Wang; Baomin Tian; Jianmin Lu; Jianyan Wang; Denbei Luo; Doug MacDonald

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 83 KB
• Volume: 10
• Category: Article
• ISSN: 1040-0397
• DOI: 10.1002/(sici)1521-4109(199805)10:6<399::aid-elan399>3.0.co;2-k

✦ Synopsis

A newly designed remote probe has been developed for stripping measurements of trace mercury at large sample-instrument distances. Various gold electrodes, stripping modes, and operation conditions have been optimized to meet the requirement of remote monitoring of mercury. The favorable stripping potentiometric response obtained following 0.5-1.0 min deposition, leads to a rapid detection of low ppb mercury concentrations, and offers a fast warning capability. The optimized protocol offers a low detection limit ( of 0.3 mg/L with 5 min deposition) and good precision (RSD of 3.9 % for n ¼ 100). Due to its inherent sensitivity, simplicity, stability, and smaller dimensions the new probe is well suited for in situ monitoring of trace mercury in natural waters.