Ecological Systems and Devices Annotation << Back Metrological maintenance of the control of emissions of vehicles Kolobova A.V., Seljukov D.N. It is considered Russian metrological assurance of measurement tasks on СО, С3Н8, СО2, О2 in automotive exhaust emis-sions. It is founded necessity of improvement of metrological characteristics both on a level of National Primary Measure-ment Standard of units of mole fraction and mass concentration of components in gas media (GET 154-01) and on a level of calibration gas mixtures in cylinders which have status of certified reference materials (CRMs), on purpose to a control of compliance of set ecological norms on automotive exhaust emissions.