Laboratory DP “Ingas” took part in the first round of international proficiency testing PT.UA.10.1.2018 “MICROPRIMES IN CLEAN INERT GASES” conducted by Metrologiya Service LLC. The purpose of this qualification test for the determination of micronutrients of pure inert gases is to evaluate the performance characteristics and improve the reliability of the test results. So within the framework of these tests, we obtained a certificate confirming the technical competence of our laboratory in terms of qualitative and quantitative methods and measurements. More details about the test, methods, etc., can be found on the website of the organizer.