Transactions of the VSB - Technical University of Ostrava Safety Engineering Series, ISSN 1805-3238 Vol. XVII, No. 2, 2022 14 pp. 14-25, DOI: 10.35182/tses-2022-0005 DETERMINATION OF OZONE CONCENTRATION AND ITS EFFECT ON DEGRADATION OF MATERIALS Romana FRIEDRICHOVÁ 1 , Jan KARL 2 , Milan RŮŽIČKA 3 , Anna VYSKOČILOVÁ 4 , Marek MARTINEC 5 , Martin VESELÝ 6 , Jan ŠKUBNÍK 7 , Vladimíra SVOBODOVÁ PAVLÍČKOVÁ 8 , Silvie RIMPELOVÁ 9 , Martin KUCHAŘ 10 1 Ministry of Interior, Fire Rescue Service of the Czech Republic, Technical Institute of Fire Protection, Prague, Czech Republic, Romana.Friedrichova@hzscr.cz 2 Ministry of Interior, Fire Rescue Service of the Czech Republic, Technical Institute of Fire Protection, Prague, Czech Republic, Karl@hzscr.cz 3 Ministry of Interior, Fire Rescue Service of the Czech Republic, Technical Institute of Fire Protection, Prague, Czech Republic, Milan.Ruzicka@hzscr.cz 4 Ministry of Interior, Fire Rescue Service of the Czech Republic, Technical Institute of Fire Protection, Prague, Czech Republic, Anna.Vyskocilova@hzscr.cz 5 University of Chemistry and Technology Prague, Prague, Czech Republic, marek.martinec@vscht.cz 6 University of Chemistry and Technology Prague, Prague, Czech Republic, martin.vesely@vscht.cz 7 University of Chemistry and Technology Prague, Prague, Czech Republic, jan.skubnik@vscht.cz 8 University of Chemistry and Technology Prague, Prague, Czech Republic, vladimira.pavlickova@vscht.cz 9 University of Chemistry and Technology Prague, Prague, Czech Republic, silvie.rimpelova@vscht.cz 10 University of Chemistry and Technology Prague, Prague, Czech Republic, martin.kuchar@vscht.cz Abstract: The ongoing Covid-19 pandemics showed the need for the efective decontamination of environment and surfaces. One of the options could be the use of gas ozone. Ozone has been well known for its disinfection properties, which were in the past used to decontaminate water. In this article, we present a development of an easy-made and ready-to-use portable detector of ozone, which could be used to easily detect ozone in the environment. In addition, we studied degradation impact of ozone on diferent materials, which normally occur in households or at working places. Ozone is well detectable and does not cause any damage to materials at concentrations needed for decontamination of the environment. Keywords: Detector, FTIR Spectroscopy, Material Degradation, Ozone, Disinfection. Research article Introduction In 2020, we met with the worldwide COVID-19 pandemic for the frst time. The issue of disinfection/ decontamination of surroundings began to be solved at the same time. In the following periods, disinfection was carried out in large quantities, whether it was the space of hospitals, ofces or even bus stops, playgrounds and other open and closed spaces. At this time, the market was saturated with various manufacturers of disinfectants with diferent, even magical properties. Disinfection procedures of space decontamination were clearly set by Fire and Rescue Service of the Czech Republic. Still, new simpler procedures were still being sought, which could be used as additional disinfection after thorough cleaning of, for example, ofces. One possibility was the use of ozone in the gas phase. This method is used for example to clean car air conditioners. Ozone is also used for the disinfection of water and for the production of ozone water as a disinfectant. First, we were thinking about the possibilities to use ozone for the disinfection of surface or air. In the course of testing this, many questions and unknown answers emerged, which lead us to start a larger project called "Possibilities of using ozone for air and surface decontamination not only for section of Integrated Rescue System of the Czech Republic"