VDI 3794 Blatt 2-2011 Determination of depositon fluxes of ambient air pollutants - Determination of the deposition flux of ammonia and ammonium compounds by means of the IRMA-method
2013VDI 3794 Blatt 2-2013 Determination of depositon fluxes of ambient air pollutants - Determination of the deposition flux of ammonia and ammonium compounds by means of the IRMA method
2003VDI 3794 Blatt 2-2003 Determination of immission rates - Determination of the deposition rates of ammonia and ammonia compounds with the IRMA-method (Immission Rates Measurement Apparatus)
2001VDI 3794 Blatt 2-2001 Determination of immission rates - Determination of the immission rate of ammonia and ammonia compounds by means of the IRMA-method