A hydrogen peroxide sensor for exhaled breath measurement

Earlier, a hydrogen peroxide sensor based on an electrolyte metal oxide semiconductor field-effect transistor (EMOSFET) has been investigated. The sensor shows the possibility to measure hydrogen peroxide at a concentration of micro-molar level. Due to its miniaturizability, the sensor is able to detect hydrogen peroxide in a small volume and is thus especially suitable for monitoring of hydrogen peroxide in the EB. In this paper, a simple set-up for condensation of hydrogen peroxide in the EB is introduced. The set-up consists of a cooling tube using a Peltier element for condensation of the exhaled breath air and the EMOSFET-based hydrogen peroxide sensor. Using this cooling tube, primary results on the collection and measurement of hydrogen peroxide in artificial EB are given.