caa a22 4500 605465908 CHVBK 20210128100304.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00769-015-1139-y doi (NATIONALLICENCE)springer-10.1007/s00769-015-1139-y The question of homogeneity inside a chimney: application of ISO13528 to stack emission proficiency tests [Elektronische Daten] [Jens Cordes, Benno Stoffels, Dominik Wildanger] The Hessian Agency for the Environment and Geology (HLUG) in Kassel, Germany, offers stack emission proficiency tests (PTs) on an in-house-constructed emission simulation apparatus (ESA). The PTs include gaseous (organic and inorganic) and particulate matter (heavy-metal-doped dust) emissions. A unique challenge arises when ISO13528 is applied to these PTs: While homogeneity of the used gases, liquids, and dusts can easily be demonstrated, the equivalence of measurement points along the stack emission chimney is a completely different matter. Since each test item batch (in this case the pollution-doped ESA exhaust gas) only exists during one measurement, the standard procedure for determination of homogeneity (in this case equivalence of the sampling openings) is not applicable to determine compliance to the standard. To demonstrate the equivalence of the measurement points on our ESA, we devised a modified homogeneity check based on ISO13528 annexB. This modified homogeneity check was successfully applied to our stack emission PT and should be applicable to sampling PTs in general. The Author(s), 2015 Stack emissions nationallicence Proficiency tests nationallicence Sampling nationallicence Homogeneity check nationallicence ISO13528 nationallicence ISO17043 nationallicence D : Particle diameter nationallicence g : Number of proficiency test items or sampling positions/times tested in a homogeneity check nationallicence m : Number of repeat measurements made per proficiency test item or repeat samplings made per sampling position/time nationallicence q 3( D ) : Quantile of particles with a diameter ≤D nationallicence s : Standard deviation nationallicence s r : Relative standard deviation nationallicence s s : Estimate of between-sample standard deviation nationallicence s rs : Estimate of relative between-sample standard deviation nationallicence s w : Within-sample standard deviation nationallicence s x : Standard deviation of sample averages nationallicence x : Measurement result (e.g., mass concentration) nationallicence $$ \bar{x} $$ x ¯ : General average of x nationallicence σ pt : Standard deviation for proficiency assessment nationallicence Cordes Jens Department I3 - Air Pollution, Emission, HLUG, Hessian Agency for the Environment and Geology, Ludwig-Mond-Straße 33, 34121, Kassel, Germany aut Stoffels Benno Department I3 - Air Pollution, Emission, HLUG, Hessian Agency for the Environment and Geology, Ludwig-Mond-Straße 33, 34121, Kassel, Germany aut Wildanger Dominik Department I3 - Air Pollution, Emission, HLUG, Hessian Agency for the Environment and Geology, Ludwig-Mond-Straße 33, 34121, Kassel, Germany aut Accreditation and Quality Assurance Springer Berlin Heidelberg 20/4(2015-08-01), 287-295 0949-1775 20:4<287 2015 20 769 https://doi.org/10.1007/s00769-015-1139-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00769-015-1139-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cordes Jens Department I3 - Air Pollution, Emission, HLUG, Hessian Agency for the Environment and Geology, Ludwig-Mond-Straße 33, 34121, Kassel, Germany aut NATIONALLICENCE 700 1- Stoffels Benno Department I3 - Air Pollution, Emission, HLUG, Hessian Agency for the Environment and Geology, Ludwig-Mond-Straße 33, 34121, Kassel, Germany aut NATIONALLICENCE 700 1- Wildanger Dominik Department I3 - Air Pollution, Emission, HLUG, Hessian Agency for the Environment and Geology, Ludwig-Mond-Straße 33, 34121, Kassel, Germany aut NATIONALLICENCE 773 0- Accreditation and Quality Assurance Springer Berlin Heidelberg 20/4(2015-08-01), 287-295 0949-1775 20:4<287 2015 20 769