Colloidal-gold electrosensor measuring device
First Claim
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1. An electrode comprising a conducting substrate onto which is deposited 10-30 μ
- g/cm2 of colloidal gold admixed with a cationic polymer.
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Abstract
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 μg/dL in blood samples as small as 10 μL.
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Citations
22 Claims
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1. An electrode comprising a conducting substrate onto which is deposited 10-30 μ
- g/cm2 of colloidal gold admixed with a cationic polymer.
- View Dependent Claims (2, 3, 4, 5, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- 6. An electrode comprising colloidal gold dispersed in a cationic polymer matrix that is deposited onto an electrode surface to form a microelectrode array.
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21. An electrode comprising a carbon ink substrate onto which is deposited a film consisting essentially of colloidal gold particles having a size of about 200-500 Å
- admixed with a poly(ester-sulfonic acid) polymer.
- View Dependent Claims (22)
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