Scope - Soil

Scope - Soil

All matrices

All soil types

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). Measurands 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.

Measurands marked with $ are not in the scope of the accreditation.

Scheme Measurand group Measurand
ISE Acid extractable (So-called totals) AE Ag$, Al, As, B$, Ba, Be, Bi$, Br$, Ca, Cd, Ce$, Co, Cr, Cu, F$, Fe, Ga$, Hg, I$, K, La$, Li$, Mg, Mn, Mo, N, Na, Nb$, Nd$, Ni, P, Pb, Pt$, Rb$, S, Sb, Sc$, Se$, Si$, Sn, Sr$, Te$, Th$, Ti$, Tl$, U$, V, Y$, Zn, Zr$ 50 measurands, 25 accredited
ISE Act. CEC using 0.01M BaCl2 (ISO 11260) BA Al$, Ca$, CEC$, Fe$, H$, K$, Mg$, Mn$, Na$ 9 measurands, 0 accredited
ISE Act. CEC using 0.1M BaCl2 (UNEP-UN/EC 91065A) BB Al$, Ca$, CEC$, Fe$, H$, K$, Mg$, Mn$, Na$ 9 measurands, 0 accredited
ISE Act. CEC using cobaltihexamine (AFNOR NFX 31 130) CH Al$, Ca, CEC, Fe$, H$, K, Mg, Mn$, Na 9 measurands, 5 accredited
ISE Aqua Regia (ISO 54321) (replacing former ISO 11466) AR Ag$, Al, As, B, Ba, Be, Bi$, Br$, Ca, Cd, Ce$, Co, Cr, Cu, F$, Fe, Ga$, Hg, I$, K, La$, Li$, Mg, Mn, Mo, Na, Nd$, Ni, P, Pb, Pt$, Rb$, S, Sb, Sc$, Se$, Si$, Sn$, Sr, Te$, Th$, Ti, Tl$, U$, V, Y$, Zn, Zr$ 48 measurands, 26 accredited
ISE Extraction with 0.01M CaCl2 - 0.005M DTPA 1:10 (w/v) CAT Cd$, Cu, Fe, Mn, Zn 5 measurands, 4 accredited
ISE Extraction with 0.01M CaCl2 1:10 CC Al$, B$, Cd$, CN$, Co$, Cr$, Cu$, Fe$, K, Mg, Mn$, N - NH4 (as N), N - NO3 (as N), N total soluble$, Na, Ni$, P, Pb$, S$, SO4$, Zn$ 21 measurands, 6 accredited
ISE Extraction with 0.1M NaNO3 SN Cd$, Cu$, Ni$, Pb$, Zn$ 5 measurands, 0 accredited
ISE Extraction with 1M HCl (Polish standard) HCLPN B$, Cu$, Fe$, Mn$, Zn$ 5 measurands, 0 accredited
ISE Extraction with 1M KCl 1:10 (w/v) KCL Exchangeable Acidity$, N - NH4 (as N), N - NO3 (as N) 3 measurands, 2 accredited
ISE Extraction with boiling 2M HNO3 NA Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Tl$, Zn 10 measurands, 9 accredited
ISE Extraction with Ca-lactate (VDLUFA, Germany) CAL K$, P$ 2 measurands, 0 accredited
ISE Extraction with dilute nitric acid (0.43 Mol/l) ISO 17586 EDNA Ag$, Al$, As$, B$, Ba$, Be$, Br$, Ca$, Cd$, Co$, Cr$, Cu$, Fe$, Hg$, K$, Mg$, Mn$, Mo$, Na$, Ni$, P$, Pb$, S$, Sb$, Se$, Sn$, Sr$, Te$, Ti$, Tl$, V$, Zn$ 32 measurands, 0 accredited
ISE Extraction with double lactate (VDLUFA, Germany) DL K$, P$ 2 measurands, 0 accredited
ISE Fluoride (Swiss standard procedure) F F - Total$ 1 measurands, 0 accredited
ISE Mehlich-1 M1 Cu$, Fe$, Mn$, Zn$ 4 measurands, 0 accredited
ISE Mehlich-3 M3 Al, As$, B, Ca, Cd$, Co$, Cr$, Cu, Fe, K, Mg, Mn, Na, P, Pb$, Se$, Zn 17 measurands, 11 accredited
ISE Other determinations OD B - Hot water$, CN - Free$, CN - Total$, delta 13C$, delta 15N$, K - HCl (as K)$, Mg - NaCl (as Mg)$, Moisture-content 8 measurands, 1 accredited
ISE PEP-Ammoniumacetate-EDTA extraction PEP-AAE10 AAE10-Ca, AAE10-K, AAE10-Mg, AAE10-P$ 4 measurands, 3 accredited
ISE PEP-Cation Exchange Capacity PEP-CEC BAS$, Ca$, H$, K$, KAK$, Mg$, Na$, S-Wert$ 8 measurands, 0 accredited
ISE PEP-Physical parameters PEP-PP C-org, Humus, ROC_600$, ROC_900$, Sand, Schluff (silt)$, TIC_900A$, TIC_900B$, TOC_400, Ton (clay)$ 10 measurands, 4 accredited
ISE PEP-Test measurements PEP-TM CaCO3$, CC-Mg$, CO2-K, CO2-P, pH-CC$, pH-H2O 6 measurands, 3 accredited
ISE PEP-Water extraction PEP-H2O10 H2O10-K, H2O10-Mg, H2O10-P$ 3 measurands, 2 accredited
ISE Phosphorus and related analysis PHOS Al - Ox$, Fe - Ox$, K - AL (as K)$, P - Ox$, P - AL (as P), P - Bray (as P)$, P - Olsen (as P), P - w (as P)$ 8 measurands, 2 accredited
ISE Pot. CEC using 1M NH4-acetate at pH=7 AA Al$, Ca, CEC, K, Mg, Na 6 measurands, 5 accredited
ISE Pot. CEC using 1M NH4Cl (BZE) AC Al$, Ca$, CEC$, Fe$, H$, K$, Mg$, Mn$, Na$ 9 measurands, 0 accredited
ISE Pot. CEC using 1M or 0.1M BaCl2-TEA at pH=8.1 (ISO 13536 OR BZE) BC Al$, Ca$, CEC$, K$, Mg$, Na$ 6 measurands, 0 accredited
ISE Real totals RT Ag$, Al, As, B$, Ba, Be$, Bi$, Br, C-elementary, Ca, Cd, Ce, Co, Cr, Cs$, Cu, Dy$, F$, Fe, Ga, Gd$, Ge$, Hg, I$, K, La, Li$, Mg, Mn, Mo$, N - elementary, Na, Nb, Nd$, Ni, P, Pb, Pd$, Pr$, Pt$, Rb, Rh$, S, Sb, Sc$, Se$, Si, Sm$, Sn, Sr, Te$, Th$, Ti, Tl$, U$, V, W$, Y, Yb$, Zn, Zr 61 measurands, 35 accredited
ISE Soil characteristics SC Active Lime (as CaCO3)$, C - org others (W&B a.o.), EC - saturated paste$, EC-SC (ISO 11265), Fraction < 16 µm, Fraction < 2 µm, Fraction < 63 µm, Fraction > 50 µm (USDA)$, Fraction > 63 µm, Fraction 2 - 50 µm (USDA)$, Org.matter (L.O.I.), pH - CaCl2, pH - H2O, pH - KCl, TC=Total C (org.+inorg.), TIC=Tot.Inorg C(as CaCO3), TOC=Total Org. C 17 measurands, 13 accredited
ISE UK Soil Methods UK K - NH4NO3 (1/5), Mg - NH4NO3 (1/5), P – NaHCO3 (1/20), pH - H2O (2/5) 4 measurands, 4 accredited
ISE Water soluble 1:10 (w/v) (EN-12457-4) WS Br$, Cl$, F$, N - NO3 (as N)$ 4 measurands, 0 accredited
ISE Water soluble 1:10 (w/v) (Neth standard VPR C85-06) WSVPR Br$, Cl$, F$, SO4$ 4 measurands, 0 accredited