Combination ion-selective electrode with a replaceable sensing membrane
First Claim
1. A combination ion-selective electrode comprising:
- a removable cap holding an ion-selective membrane wherein a liquid junction is not formed between a reference electrolyte and a sample solution, and wherein said cap and ion-selective membrane may be removed without loss of said reference electrolyte from the combination ion-selective electrode.
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Accused Products
Abstract
An improved combination ion-selective electrode apparatus is provided that comprises an electrode body, a reference electrode, and an ion-sensing electrode. The reference electrode comprises a ion-permeable junction. A removable membrane cap contains a ion-selective membrane. The membrane cap can be removed from the ion-selective electrode apparatus without endangering the integrity of the reference electrode and is distinct from the ion-permeable junction. The membrane cap contains a removable ion-sensitive membrane that can be replaced if the ion-sensitive membrane fails to thereby place the combination ion-selective electrode apparatus back into service. Moreover, a single combination ion-selective electrode apparatus can be used to measure a variety of analyte ions by simple replacement of the membrane cartridge.
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Citations
33 Claims
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1. A combination ion-selective electrode comprising:
a removable cap holding an ion-selective membrane wherein a liquid junction is not formed between a reference electrolyte and a sample solution, and wherein said cap and ion-selective membrane may be removed without loss of said reference electrolyte from the combination ion-selective electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A combination ion-selective electrode comprising:
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an electrode body having a reference half-cell including a reference electrolyte;
an ion-permeable junction connected to said electrode body;
an ion-selective electrode disposed through said ion-permeable junction in a manner such that a liquid junction is not formed between said reference electrolyte and a sample solution; and
an ion-selective membrane removably connected to said ion-permeable junction without loss or contamination of said reference electrolyte, said ion-selective membrane in functional connection with said ion-selective electrode. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A combination ion-selective electrode comprising:
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an electrode body having a reference half-cell including a reference electrolyte;
an ion-permeable junction connected to said electrode body;
an ion-selective electrode disposed through said ion-permeable junction in a manner to prevent fluid from escaping from said electrode body and not form a liquid junction between said reference electrolyte and a sample solution; and
an ion-selective membrane removably connected to said ion-permeable junction without loss or contamination of said reference electrolyte, said ion-selective membrane in functional connection with said ion-selective electrode. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A combination ion-selective electrode comprising:
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an electrode body having a reference half-cell including a reference electrolyte;
an ion-permeable junction connected to said electrode body;
an ion-selective electrode disposed through said ion-permeable junction in a manner to prevent fluid from escaping from said electrode body and not form a liquid junction between said reference electrolyte and a sample solution; and
a cap holding a replaceable ion-selective membrane, said cap removably connected to said ion-permeable junction without loss or contamination of said reference electrolyte, said ion-selective membrane in functional connection with said ion-selective electrode. - View Dependent Claims (32, 33)
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Specification