Determination of HgII Ion with a 1,11-Bis(8-quinoyloxy)-3,6,9-trioxaundecane-Modified Glassy Carbon Electrode Using Spin-Coating Technique
✍ Scribed by Hyun-Jung Kim; Deog-Su Park; Meong-Ho Hyun; Yoon-Bo Shim
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 78 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1040-0397
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✦ Synopsis
A glassy carbon electrode modified with an open-chain crown ether, 1,11-bis(8-quinolyloxy)-3,6,9-trioxaundecane (BQT), using a spin coating method, has been applied for the highly selective and sensitive analysis of trace amounts of Hg II . The modified electrode Hg II ion was spontaneously deposited on the modified electrode and the resulting surfaces were characterized by anodic stripping voltammetry. The linear sweep voltammogram of the modified electrode deposited with Hg II ion shows a well-defined anodic peak at þ0.17 V. The detection limit with linear sweep voltammetry was 1.0 × 10 ¹8 M and was about 7.0 × 10 ¹10 M Hg II by differential pulse anodic voltammetry. The response reproduced with a value of 6.1 % relative standard deviation. The presence of 20-fold molar Ag I , Cd II , Pb II , Fe II , Ni II , Co II , Cu II , Al III , Mg II , Sb III , Ti II , and Zn II did not interfere in the analysis of Hg II ion except Fe II . The electrode has been successfully applied to the determination of trace amounts of the Hg II ion in the human urine sample.