Abstract
The paper presents the results of the development of a differential generator photoionization detector that is capable of determining the concentration of biomarkers in the exhaled gas of a person. There is a description of the differential generator photoionization detector design, its principle of operation. The authors consider the possibility of using a differential generator photoionization detector in a measuring setup designed to determine the concentration of biomarkers during respiration to detect gastrointestinal diseases. The paper presents a setup diagram and describes its operation and elements. The possibility of using the setup for determining the ammonia concentration in the range of 10–200 ppm and measuring the hexane concentration in the range of 0.5–1 ppb to a precision of ±10% has been experimentally confirmed.
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