The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 21, 1995
Filed:
Sep. 30, 1994
Steven Wegner, Chapel Hill, NC (US);
Michael A Harpold, Durham, NC (US);
Terence M McCaffrey, Durham, NC (US);
Susan E Morris, Chapel Hill, NC (US);
Marek Wojciechowski, Cary, NC (US);
Junguo Zhao, Chapel Hill, NC (US);
Robert W Henkens, Durham, NC (US);
Najih Naser, Durham, NC (US);
John P O'Daly, Carrboro, NC (US);
Andcare, Inc., Durham, NC (US);
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 .mu.g/dL in blood samples as small as 10 .mu.L.