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pH electrode and methods of preparing and using same

  • US 6,860,984 B2
  • Filed: 11/02/2001
  • Issued: 03/01/2005
  • Est. Priority Date: 05/04/1999
  • Status: Expired due to Fees
First Claim
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1. A pH electrode having a pH-sensitive region on an electrically conductive support, said pH-sensative region comprisinga mixture of between 50 and 85% of the total mixture by weight of metal particles, said metal particles consisting of particles of antimony and optionally particles of Group VIII metals, particles of additional Group VA metals other than antimony, or both, and a polymer substrate of a non-shrinking polyimide having a resistivity of 10 to 100 Kohms/square;

  • wherein the mixture of metal particles is incorporated in, or applied to, the polymer substrate and, wherein when said particles are incorporated into said resistive polymer substrate, said pH-sensitive region is abraded to expose said particles.

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