Colloidal-gold electrosensor measuring device

Title: Colloidal-gold electrosensor measuring device

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The present invention provides a new device for use in measuring lead levels in biological and environmental samples. Using square wave coulometry and colloidal gold particles impregnated on carbon electrodes, the present invention provides a rapid, reliable, portable and inexpensive means of detecting low lead levels. The colloidal gold modified electrodes have microelectrode array characteristics and produce significantly higher stripping detection signals for lead than are produced at bulk gold electrode surfaces. The method is effective in determining levels of lead down to at least 5 {micro}g/dL in blood samples as small as 10 {micro}L. 9 figs.

Inventors:: Wegner, S.; Harpold, M.A.; McCaffrey, T.M.; Morris, S.E.; Wojciechowski, M.; Zhao, J.; Henkens, R.W.; Naser, N.; O`Daly, J.P.

Issue Date:: 1995-11-21

OSTI Identifier:: 131930

Assignee:: Andcare, Inc., Durham, NC (United States) PTO; SCA: 540220; 560300; PA: EDB-95:158334; SN: 95001489051

Patent Number(s):: US 5,468,366/A/

Application Number:: PAN: 8-316,433

Contract Number:: FG05-94ER81657

Resource Relation:: Other Information: PBD: 21 Nov 1995

Research Org:: ANDCARE Inc

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; LEAD; MEASURING METHODS; MEASURING INSTRUMENTS; DESIGN; BIOLOGICAL MATERIALS; ECOLOGICAL CONCENTRATION; PORTABLE EQUIPMENT; COLLOIDS; BIOLOGICAL ACCUMULATION

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Colloidal-gold electrosensor measuring device

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The present invention provides a new device for use in measuring lead levels in biological and environmental samples. Using square wave coulometry and colloidal gold particles impregnated on carbon electrodes, the present invention provides a rapid, reliable, portable and inexpensive means of detecting low lead levels. The colloidal gold modified electrodes have microelectrode array characteristics and produce significantly higher stripping detection signals for lead than are produced at bulk gold electrode surfaces. The method is effective in determining levels of lead down to at least 5 .mu.g/dL in blood samples as small as 10 .mu.L.
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