Disposable working electrode for an electrochemical cell
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Abstract
A flow-through electrochemical cell assembly with a disposable working electrode structure, including (a) a perimeter wall defining a sample flow channel including an inlet and an outlet, (b) a sample inlet line in fluid communication with the sample flow channel inlet, (c) a sample outlet line providing fluid communication between the sample flow channel outlet and a remote reference electrode, and (d) a disposable working electrode structure comprising an electrically conductive and electrochemically active working electrode region bound as a layer, directly or indirectly, to an electrically insulating substrate surface. The substrate surface is in fluid-sealing relationship with the sample flow channel, and the working electrode region is in fluid communication with said sample flow channel. The working electrode is vapor deposited, directly or indirectly, onto the organic polymer substrate through a mask, and a fluid seal is formed between said working electrode region and perimeter wall.
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Citations
33 Claims
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1-15. -15. Cancelled.
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16. A method for making a disposable working electrode structure and a sample flow channel for use in an electrochemical cell assembly, said method comprising:
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(a) vapor depositing electrically conductive and electrochemically active material, directly or indirectly, onto an organic polymer substrate through a mask to form a pattern of a working electrode region, and (b) forming a fluid seal between said working electrode region and a perimeter wall to define said fluid sample flow channel with said working electrode region in direct fluid contact with said fluid sample flow channel. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for making a flow-through electrical cell assembly comprising:
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vapor depositing electrically conductive and electrochemically active material, directly or indirectly, onto an organic polymer substrate through a mask to form a pattern of a working electrode region;
providing a reference electrode including a wall having an inlet and an outlet spaced therefrom;
mounting a sealing member to said wall to define a sample flow channel fluidly coupling said inlet and said outlet; and
positioning said substrate, and said working electrode region thereon, on said sealing member such that said working electrode region is in fluid communication with said sample flow channel. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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Specification