Project: Standard to certify the purity of zero gas in ambient air measurements

The Air Quality Directive requires monitoring networks across the EU to perform traceable measurements of gas pollutants at extremely low levels, to protect public health and the environment. To attain these low levels, purified ‘zero gases’ are required to set the zero point on measuring instruments, from which low-level impurities can be detected. However, while European standards governing the measurement of pollutants specify the purity levels required for zero gases, they do not give instructions on how to achieve them. EMRP project ENV01 MACPoll established a Certification Protocol for Zero Gas that enables the assessment of the purity of the zero gases (nitrogen or clean air) typically used to calibrate pollution monitoring instruments. This project aims to maximise uptake of the Certification Protocol, identified as a high priority by primary supporter ISO/TC 158, by converting it into an internationally-accepted ISO standard. Application of this standard will ensure consistent measurements of the purity of zero gases across Europe’s pollution monitoring networks, enabling compliance with EU regulations.

Acronym 15SIP01 Zero Gas (Reference Number: 15SIP01)
Duration 01/06/2016 - 01/06/2018
Project Topic Metrology
Project Results
(after finalisation)
See Website
Website visit project website
Network EMPIR
Call EMPIR CALL 2015

Project partner

Number Name Role Country
1 VSL B.V. Coordinator Netherlands
2 Ilmatieteen Laitos Partner Finland