“…The interference testing was essential to establish the magnitude of the possible confounding effects of humidity, 92,93 CO 2 , alcohol, and isoprene, which are relevant to human subject testing with chemiluminescence. 94,95 Electrical and safety testing was performed, and the functionality of the system was validated. The following parameters were examined: accuracy, precision, linearity, and the lowest detection limit in pure laboratory gas and in simulated breath (air with added humidity and CO 2 ).…”