General - Scope - Plants

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.

ProgramDeterminand groupDeterminand
IPEInorganic Chemical CompositionAg$, As, B, Ba, Be$, Bi$, Br$, Ca, Cd, Cl (as Cl), Co, Cr, Cs$, Cu, F$, Fe, Ga$, Hg, I$, K, Li, Mg, Mn, Mo, N - Kjeldahl (as N), N - NH4 (as N)$, N - NO3 (as N)$, Na, Ni, P (as P), Pb, Pd$, Pt$, Rb$, Rh$, S (as S), Sb$, Se, Sn$, SO4 (as SO4)$, Sr, Ti$, V, Zn
IPEReal totalsAl, C - elementary, N - elementary, Si$
IPEAcid extractable (So-called totals)Al, Si$
IPEOther determinationsdelta 13C, delta 15N
IPENutritional valuesADF-ash-free$, Crude fibre, NDF-ash-containing$, NDF-ash-free$, Polysaccharides (starch)$, Total ash, Total Disaccharides$, Total fat$, Total monosaccharides$
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