Article ID Journal Published Year Pages File Type
1170777 Analytica Chimica Acta 2007 5 Pages PDF
Abstract
A novel method for determination of mercury was developed using an intermittent flow electrochemical cold vapor generation coupled to atomic fluorescence spectrometry (IF-ECVG-AFS). The mercury vapor was generated on the surface of glassy carbon cathode in the flow cell. The operating conditions for the electrochemical generation of mercury vapor were investigated in detail, and the interferences from various ions were evaluated. Under the optimized conditions, no evident memory effects of mercury were observed. The calibration curve was linear up to 5 μg L−1 Hg at 0.54 A cm−2. A detection limit of 1.2 ng L−1 Hg and a relative standard deviation of 1.8% for 1 μg L−1 Hg were obtained. The accuracy of method was verified by the determination of mercury in the certified reference human hair. The ECVG avoided the use of reductants, thereby greatly reducing the contamination sources. In addition, the manifold of IF-ECVG-AFS was simple and amenable to automation.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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