Microband sensor for As(III) analysis: Reduced matrix interference

Simple item page
dc.contributor.authorDudeney, Richard
dc.contributor.authorNewman, Jeffrey
dc.contributor.authorDavis, Frank
dc.contributor.authorSetford, Steven
dc.contributor.authorTothill, Ibtisam E.
dc.date.accessioned2017-08-02T15:33:11Z
dc.date.available2017-08-02T15:33:11Z
dc.date.issued2017-07-17
dc.description.abstractA portable sensor based on a microband design for arsenic detection in drinking water is presented. The work was focused to minimize interference encountered with a standard screen-printed electrodes featuring an onboard gold working electrode, carbon counter and silver−silver chloride pseudo-reference electrodes as composite coatings on plastic surface. The interference effect was identified as chloride ions interacting with the silver surface of the reference electrode and formation of soluble silver chloride complexes such as AgCl43−. By modification of the reference electrodes with Nafion membrane (5 % in alcohols), the interference was entirely eliminated. However, membrane coverage and uniformity can impact the electrodes reproducibility and performance. Hence, the sensor design was further considered and a microband format was produced lending favorable diffusive to capacitive current characteristics. Using the microband electrodes allowed As(III) detection with limit of detection of 0.8 ppb (in 4 M HCl electrolyte), inherently avoiding the problems of electrode fouling and maximizing analyte signal in river water samples. This is below the World Health Organization limit of 10 μg L−1 (ppb). The electrolyte system was chosen so as to avoid problems from other common metal ions, most notably Cu(II). The presented electrode system is cost effective and offers a viable alternative to the colorimetric test kits presently employed for arsenic analysis in drinking water.en_UK
dc.identifier.citationDudeney R, Newman JD, Davis F, Setford SJ, Tothill IE, Microband sensor for As (III) analysis: reduced matrix interference, Electroanalysis, Vol. 29, Issue 10, October 2017, pp. 2332-2339en_UK
dc.identifier.issn1040-0397
dc.identifier.urihttp://dx.doi.org/10.1002/elan.201700242
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12266
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-NonCommercial 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectMicroband electrodeen_UK
dc.subjectGold electrodesen_UK
dc.subjectAbsorptive stripping voltammetryen_UK
dc.subjectArsenicen_UK
dc.titleMicroband sensor for As(III) analysis: Reduced matrix interferenceen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Microband_sensor_for_As_analysis-2017.pdf
Size:
513.08 KB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Staff publications (SATM)