3. Metrology

3.1 Emissions from stationary sources

For stationary sources, please refer to the following standard: Afnor XP X 43-305.

This method samples a gas flowing through a pipe (chimney type) to determine the nitrous oxide flows passing through it. Two types of container can be used to store these gas samples.

The first, generally made of Pyrex, is fitted with two valves that allow the gas to circulate, flushing the container before closing it. This type of container will trap a given volume at a pressure slightly higher than atmospheric...