Intercomparison of NO2 Reference Calibration Methods. 11-14 September 1995, Ispra.

Abstract

Five European expert labs participated in the intercomparison of NO2 reference calibration methods organised at the JRC-Ispra in the context of harmonisation of NO2 calibration procedures. During the present intercomparison, differences of between 2-7% were observed between the Saltzman method implemented by two expert labs (LUA and UMEG) and three other reference calibration methods implements by three other expert labs (ERLAP, UBA, RIVM). this study confirms the validity of the NO2 reference calibration method proposed by the EU directive (permeation method) and questions to use of the Saltzman method as a primary reference method.