General - Scope - Manure and Compost
Wageningen University is accredited for the organization of Interlaboratory Studies by the Dutch Accreditation Council RvA under registration number R002. The accreditation is based on the ISO/IEC- requirements (General requirements for proficiency testing, ISO/IEC 17043:2010). Determinands only meet the criteria for accreditation if the results are reported by a sufficient number of participants for at least three years and the results have proven to be homogeneous and stable.
Elements noted with $ are not in the scope of the accreditation.
| Program | Determinand group | Determinand |
|---|---|---|
| MARSEP | Inorganic Chemical Composition | Ag$, Al, As, B, Ba$, Be$, Bi$, TC =totalC (org+inorg), TOC =total org.C$, OC = org.C$, Ca, Cd, Ce$, Cl$, Co, Cr, Cu, F$, Fe, Ga$, Hg, I$, K, Li$, Mg, Mn, Mo, N, N - NH4 (as N)$, N - NO3 (as N)$, Na, Ni, P, Pb, S, S - SO4 (as S)$, Sb$, Se$, Si$, Sn$, Sr$, Th$, Ti$, Tl$, U$, V, Zn |
| MARSEP | Other determinations | AOX$, loss-on-ignition, residue-on-ignition$, COD$, mineral oil$, dry weight |