Disposable working electrode for an electrochemical cell

A flow-through electrochemical cell assembly comprising:

• a working electrode structure including
• an electrically insulating substrate, and
• a working electrode disposed on a surface of the electrically insulating substrate;
• a sealing member positioned to define a sample flow channel bordered on at least one side by a region of the electrically insulating substrate selected such that the working electrode is positioned at least partially within the sample flow channel, the sample flow channel having an inlet and an outlet;
• a reference electrode in fluid communication with the sample flow channel;
• and
• a counter electrode in fluid communication with the sample flow channel.

A flow-through electrochemical cell assembly comprising:

• a reference electrode including a wall having an inlet and outlet spaced therefrom;
• a sealing member mounted to said wall and defining a sample flow channel fluidly coupling said inlet and said outlet;
• and
• a working electrode structure including an electrically insulating substrate and a working electrode disposed along a surface portion of said electrically insulating substrate;
• wherein said sample flow channel is capped by said working electrode structure such that said working electrode is in fluid communication with said sample flow channel.