Eurovent 4/4: Sodium chloride aerosol test for filters using flame photometric technique

This test method has initially been developed by the Chemical Defence Establishment Porton Down (UK) and modified by the Atomic Energy Research Establishment in Harwell (UK). It is primarily intended for filters of low penetrations less than 0,001% to those with penetrations approaching 100%. The downloadable document includes English, French, and German versions of the Recommendation.