| Definition | This material is certified for mass fractions of Al, B, Ba, Ca, Cd, Co, Cr, Cu, Fe, Hg, Mg, Mn, Mo, Ni, Pb, Sb, Se, Sn, V, Zn in sewage sludge in addition to its pH and loss-on ignition values. It is dried, milled and sieved powder (<180 µm). Besides, the certificate includes informative values for Ag, Be, K, Li, Na, Sr, Ti, Humidity, Total Kjeldahl Nitrogen (TKN), Toplam Organic Carbon (TOC), Total Phosphorus (TP) ve conductivity. |