Trace Detection of Mercury(II) Using Gold Ultra-Microelectrode Arrays
The electroanalytical detection of trace mercury(II) at gold ultra‐microelectrode arrays is reported. The arrays consist of 256 gold microelectrodes of 5 μm in diameter in cubic arrangements which are separated from their nearest neighbor by 100 μm. The array was utilized in nitric acid using linear...
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Published in | Electroanalysis (New York, N.Y.) Vol. 18; no. 6; pp. 573 - 578 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.03.2006
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | The electroanalytical detection of trace mercury(II) at gold ultra‐microelectrode arrays is reported. The arrays consist of 256 gold microelectrodes of 5 μm in diameter in cubic arrangements which are separated from their nearest neighbor by 100 μm. The array was utilized in nitric acid using linear sweep voltammetry where a linear response from mercury additions over the range 10 μg L−1−200 μg L−1 (10−8−10−6 M) was observed with a sensitivity and detection limit of 0.11 nC/μg L−1 and 3.2 μg L−1 (16 nM) respectively from using a deposition time of 30 s at −0.2 V (vs. SCE). This methodology was explored in 0.1 and 1 M chloride media over the mercury range 10 μg L−1−200 μg L−1 (5×10−8−10−6 M) where similar sensitivities of 0.087 nC/μg L−1 and 0.078 nC/μg L−1 were observed with an identical detection limit. The protocol is demonstrated to be useful for the determination of mercury for analysis of environmental water samples. |
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Bibliography: | ArticleID:ELAN200503437 istex:E323E958C283F71F24C6265CDD20E48E055986C1 ark:/67375/WNG-Z6DLD99F-N |
ISSN: | 1040-0397 1521-4109 |
DOI: | 10.1002/elan.200503437 |