Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1170777 | Analytica Chimica Acta | 2007 | 5 Pages |
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 Lâ1 Hg at 0.54 A cmâ2. A detection limit of 1.2 ng Lâ1 Hg and a relative standard deviation of 1.8% for 1 μg Lâ1 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.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Xun Li, Zhenghao Wang,