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Proficiency test SYKE 10/2012 - Leaching testing of solid waste sample

ISBN (pdf):978-952-11-4179-9 
Julkaisusarja ja numero:Reports of the Finnish Environment Institute 19/2013 
Kustantaja:Finnish Environment Institute 
Saatavuus (pdf):http://hdl.handle.net/10138/39609 
Tekijät:Katarina Björklöf; Kaija Korhonen-Ylönen; Marika Kaasalainen; Mirja Leivuori; Sirpa Väntsi; Sari Lanteri; Markku Ilmakunnas  

48.00 €

Proftest SYKE carried out this proficiency test for leaching testing of contaminated samples using one stage- and two stage batch leaching tests in October 2012. In total 19 laboratories took part in this test. Sample material was ash from recycled fuel and wood in which the main harmful components were Cl-, Cr, Mo, Pb, Se SO42- and Zn. The particle size of the sample was 0.006-0.063 mm and the total organic carbon (TOC) content of the sample was less than 5 g/kg dry weight. The following analyses were tested • metals (As, Ba, Cd, Cr, Cu, Mo, Ni, Pb, Sb, Se, Zn) • Cl-, SO42-, F-, DOC, pH and conductivity. The standard methods EN 12457-2 (one stage batch leaching test) and EN 12457-3 (two stage batch leaching test) were used to determinate the leaching properties of studied components from the sample. Some differences in procedures used by the participants in the leaching tests were recorded for shaking the sample and separation of the eluate. It and it is likely that these differences affected the results. The evaluation of the participating laboratories was done using z-scores. The amount of satisfactory results was slightly higher than in the previous proficiency test, 87%, when the total target deviations varied between 10-50 % for metals.