Antimony and graphite hydrogen ion electrode and method of making such electrode
First Claim
1. An electrode for use in measuring hydrogen ion concentration comprising, a graphite core;
- an antimony/antimony oxide sensor secured in electrical contact with said graphite core and having an exposed surface for immersion in a test solution; and
means for electrically isolating said graphite core and antimony/antimony oxide sensor junction from said test solution when said antimony/antimony oxide exposed surface is immersed therein.
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Accused Products
Abstract
A solid state electrode that includes a graphite core as both the internal reference and the electrical conductor that is preferably formed of graphite threads maintained as a bundle that in one embodiment, has an end thereof coated with a mixture of antimony and antimony oxide as a sensor element, the graphite junction forming the internal reference to that sensor element, and in another embodiment, the graphite core is wrapped tightly around a sensor formed from section or "shot" of a mixture antimony and antimony oxide, the graphite junction forming the internal reference thereto. The connected graphite core and antimony/antimony oxide sensor are then covered with an impermeable non-conductive plastic sheath, leaving a section of the antimony/antimony oxide sensor surface exposed, and the junction of that sheath to the antimony/antimony oxide sensor is preferably sealed as with an epoxy.
82 Citations
25 Claims
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1. An electrode for use in measuring hydrogen ion concentration comprising, a graphite core;
- an antimony/antimony oxide sensor secured in electrical contact with said graphite core and having an exposed surface for immersion in a test solution; and
means for electrically isolating said graphite core and antimony/antimony oxide sensor junction from said test solution when said antimony/antimony oxide exposed surface is immersed therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- an antimony/antimony oxide sensor secured in electrical contact with said graphite core and having an exposed surface for immersion in a test solution; and
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10. An electrode for use in measuring hydrogen ion concentration comprising, an antimony/antimony oxide sensor;
- a section of graphite maintained in electrical contact to said antimony/antimony oxide sensor functioning as an internal reference;
electrically conductive means connected to said section of graphite for passing an electrical potential therefrom; and
means for electrically isolating said section of graphite and connected electrically conductive means from a test solution to leave exposed a portion of said antimony/antimony oxide sensor to said test solution. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- a section of graphite maintained in electrical contact to said antimony/antimony oxide sensor functioning as an internal reference;
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19. A process for manufacturing an antimony and graphite hydrogen ion electrode comprising the steps of, connecting a section of graphite to an antimony/antimony oxide sensor so as to provide an internal reference junction;
- connecting that section of graphite to an electrical conductor;
encasing said graphite and antimony/antimony oxide sensor junction and the electrical conductor in a liquid impervious sheath so as to leave a portion of said sensor exposed; and
connecting said electrical conductor to an electrically conductive lead. - View Dependent Claims (20, 21, 22, 23, 24, 25)
- connecting that section of graphite to an electrical conductor;
Specification