In April 2017 VTT, Nablabs and Ramboll carried out a first field trial comparing unconditioned and conditioned sampling for SO2. Tests were performed at VTT´s test bench and the data is currently being analysed. If the results given by instrumental techniques are equivalent to SRM (according to the TS 14793), they will be used as a validation protocol to the Finnish authorities to show that these alternative methods (AMs) can be used in Finland instead of EN 14791.

The results of this test and other related work in work package 2 will be published as a paper in the summer of next year – stay tuned.