Ecological Systems and Devices Annotation << Back CALS-System for Environmental Monitoring of Petroleum Product Impurities in Wastewater and Natural Waters Trokhin V.E., Bessarabov A.M., Grishaeva D.A., Trynkina L.V A method for determining petroleum product impurities in natural and waste waters using chemically pure carbon tetrachloride is considered. A CALS environmental monitoring system has been developed and methods for determining impurities in carbon tetrachloride have been considered using the following methods NMR spectroscopy, IR spectroscopy and gas-liquid chromatography. For each method, the most promising analytical instruments are included in the system. Based on the research carried out, a simplifi ed method for determining impurities in petroleum products using an AN-2 concentration meter has been proposed. An example of creating a digital twin for an instrumental analysis laboratory is given. Keywords: environmental monitoring, CALS system, petroleum product impurities, water bodies, tetra chloromethane. DOI: 10.25791/esip.1.2024.1421 Pp. 03-11.