Abstract: A kit and method for accurately determining the concentration levels of peracetic acid in a solution containing a peroxide or other oxidant is disclosed. In order to determine the concentration of peracetic acid in the solution, a pH buffer system is used to deactivate high levels of a peroxide in a disinfectant solution without interfering with active peracetic acid levels in the solution. At least one test strip is used to measure the peracetic acid concentration in the solution. A test vial for combining the solution with the pH buffer prior to contact with the test strip is provided.

Abstract: A kit and method for accurately determining the concentration levels of peracetic acid in a solution containing a peroxide or other oxidant is disclosed. In order to determine the concentration of peracetic acid in the solution, a pH buffer system is used to deactivate high levels of a peroxide in a disinfectant solution without interfering with active peracetic acid levels in the solution. At least one test strip is used to measure the peracetic acid concentration in the solution. A test vial for combining the solution with the pH buffer prior to contact with the test strip is provided.

Abstract: An electrochemical sensor is described that includes a counter electrode that prevents against electrical interference when measuring analytes in a fluid sample. The counter electrode can completely surround a working electrode and a reference electrode and can be held at a common potential voltage during operation. The counter electrode can have a U-shape for surrounding on three sides the working electrode and the reference electrode.