Division 8.2.3.5 Stabilization
United Kingdom
Sample media shall be stabilized in the PM-stabilization environment. An unused sample medium can be considered stabilized as long as it has been in the PM-stabilization environment for a minimum of 30 min, during which the PM-stabilization environment has been within the specifications of point 9.3.4. F1However, if a PM mass of 400 μg or more is expected, then the sample media shall be stabilised for at least 60 min.