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Portable lead detector

  • US 5,437,772 A
  • Filed: 11/01/1993
  • Issued: 08/01/1995
  • Est. Priority Date: 11/01/1993
  • Status: Expired due to Fees
First Claim
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1. A method of trace substance analysis, comprising the steps of:

  • introducing a solution having a low concentration of at least one metallic or non-metallic, electro-active substance into a chamber containing a transducer having a collector electrode array interdigitated with a detector electrode array;

    applying a first reducing potential to said collector electrode array for a first period of time whereby ions of said at least one metallic or non-metallic, electro-active substance are reduced from said solution and concentrated on said collector electrode array;

    applying a first oxidizing potential to said collector electrode array for a second period of time and simultaneously applying a detecting potential to said detector electrode array for said second period of time whereby said at least one metallic or non-metallic, electro-active substance concentrated on said collector array is stripped as ions from said collector electrode array back into said solution; and

    measuring a current across said detector electrode array during said second period of time to determine the amount of said at least one metallic or non-metallic, electro-active substance within said solution.

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