Precise measurements are needed to track the effectiveness of environmental legislation. For example, across Europe air monitoring stations sample air quality, but the comparability of the data collected was compromised by the quality of reference gases used to calibrate instrument zero-points. Documentary standards could support regulation and innovation, but those for ‘zero gases’ did not specify how to guarantee purity, and a ready-made solution lacked formal standing.

To support improved comparability and market solutions, the EMPIR ZeroGas project successfully lobbied to incorporate the MACPoll protocol in documentary standards.

https://www.euramet.org/casestudies/casestudiesdetails/news/standard-to-certify-zero-gas-purity/