Device for determining ionic activity
First Claim
1. A device having a frame and two solid electrodes mounted on the frame for determining the activity of ions in a liquid solution, said device comprising:
- means, including a porous member extending between the electrodes, for providing ionic flow between the electrodes upon application of liquid solution at each electrode;
a nonporous layer partially covering said porous member and spaced from said electrodes whereby liquid solution can be applied to said porous member at the electrodes, said nonporous layer inhibiting the loss of liquid solution from said porous member; and
anti-shorting means for inhibiting the solution from contacting the edges of the electrodes.
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Accused Products
Abstract
A device is disclosed for determining ion activity in liquid solutions by the use of electrodes and a capillary bridge which promotes ionic migration between the electrodes. The bridge is formed of a porous material layer into which liquid solutions are absorbed, a bottom nonporous layer between the electrodes and the porous material, and a top nonporous layer on the other side of the porous material. Preferably, the three layers are apertured at each electrode to provide wells for receiving drops of liquid solutions, and the top layer is hydrophobic to retain the solution drops in the region of the apertures.
95 Citations
9 Claims
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1. A device having a frame and two solid electrodes mounted on the frame for determining the activity of ions in a liquid solution, said device comprising:
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means, including a porous member extending between the electrodes, for providing ionic flow between the electrodes upon application of liquid solution at each electrode; a nonporous layer partially covering said porous member and spaced from said electrodes whereby liquid solution can be applied to said porous member at the electrodes, said nonporous layer inhibiting the loss of liquid solution from said porous member; and anti-shorting means for inhibiting the solution from contacting the edges of the electrodes. - View Dependent Claims (2)
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3. A device having a frame and two solid electrodes mounted on the frame for determining the activity of ions in a liquid solution, said device comprising:
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means, including a porous member extending between the electrodes, for providing ionic flow between the electrodes upon application of liquid solution at each electrode; a hydrophobic layer partially covering said porous member and spaced from said electrodes whereby liquid solution can be applied to said porous member at the electrodes, said layer (1) being a liquid barrier, (2) having holes therethrough aligned with the respective electrodes to receive liquid solution, and (3) by its hydrophobic characteristic inhibiting liquid from spreading on the layer; and anti-shorting means for inhibiting the solution from contacting the edges of the electrodes. - View Dependent Claims (4)
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5. A device having a frame and two solid electrodes mounted on the frame for determining the activity of ions in a liquid solution, said device comprising:
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a frame; two solid electrodes mounted on said frame; means, including a porous member extending between the electrodes, for providing ionic flow between the electrodes upon application of liquid solution at each electrode; and first and second nonporous layers on opposite sides of said porous member for inhibiting the loss of liquid solution from said porous member, said first nonporous layer being positioned between said porous member and the electrodes and having holes therethrough aligned with the respective electrodes for providing liquid access between said porous member and said electrodes and said second nonporous layer partially covering said porous member whereby liquid solution can be applied to said porous member at the electrodes. - View Dependent Claims (6, 7, 8, 9)
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Specification