Journal
ANALYTICAL CHEMISTRY
Volume 87, Issue 5, Pages 2560-2564Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.5b00197
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Funding
- National Science Foundation [CHE-0955439]
- Nebraska EPSCoR [EPS-1004094]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0955439] Funding Source: National Science Foundation
- EPSCoR [1004094] Funding Source: National Science Foundation
- Office Of The Director [1004094] Funding Source: National Science Foundation
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We report, for the first time, the design and fabrication of an electrochemical ion (E-ION) sensor for highly specific detection of hexavalent chromium (Cr(VI)). Unlike previously developed electrochemical Cr(VI) sensors, the sensing mechanism relies on the previously unexplored electrocatalytic reaction between Cr(VI) and surface-immobilized methylene blue (MB). The sensor is sensitive, specific, and selective enough to be used in a synthetic aquifer sample. Like many sensors of this class, it is also reagentless, reusable, and compatible with gold-plated screen-printed carbon electrodes. Despite the difference in the sensing mechanism, this E-ION Cr(VI) sensor possesses attributes similar to other MB-based electrochemical sensors, sensors with potential for real world applications.
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