General - Scope - Soil
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.
Determinands that are not in bold are not subject to accreditation.
Program | Determinand group | Determinand |
---|---|---|
ISE | Real totals | Ag, Al, As, B, Ba, Be, Bi, Br, C - elementary, Ca, Cd, Ce, Co, Cr, Cs, Cu, F, Fe, Ga, Ge, Hg, I, K, La, Li, Mg, Mn, Mo, N - elementary, Na, Nb, Nd, Ni, P, Pb, Pd, Pt, Rb, Rh, S, Sb, Sc, Se, Si, Sn, Sr, Te, Th, Ti, Tl, U, V, W, Y, Zn, Zr |
ISE | Acid extractable (So-called totals) | 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 |
ISE | Aqua Regia (ISO 11466) | 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 |
ISE | Extraction with boiling 2M HNO3 | Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Tl, Zn |
ISE | Extraction with 0.1M NaNO3 | Cd, Cu, Ni, Pb, Zn |
ISE | Extraction with 0.01M CaCl2 1:10 | 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, SO4, Zn |
ISE | Soil characteristics | C - org others (W&B a.o.), TIC=Tot.Inorg C(as CaCO3), TOC=Total Org. C, TC=Total C (org.+inorg.), Org.matter (L.O.I.), Active Lime (as CaCO3), EC-SC (ISO 11265), pH - CaCl2, pH - H2O, pH - KCl, Fraction < 2 µm, Fraction < 16 µm, Fraction < 63 µm, Fraction > 63 µm |
ISE | Other determinations | B - Hot water, CN - Free, CN - Total, delta 13C, delta 15N, K - HCl (as K), Mg - NaCl (as Mg), Moisture-content |
ISE | Fluoride (Swiss standard procedure) | F - Total |
ISE | Digestion with conc. HNO3 + conc. HCl + H2O2 (UNEP-UN/EC 91075A) | Al, As, B, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Li, Mg, Mn, Mo, Na, Ni, Pb, S, Sb, Se, Si, Sn, Sr, Tl, V, Zn |
ISE | Pot. CEC using 1M NH4-acetate at pH=7 | CEC, Al, Ca, K, Mg, Na |
ISE | Pot. CEC using 1M or 0.1M BaCl2-TEA at pH=8.1 (ISO 13536 OR BZE) | CEC, Al, Ca, K, Mg, Na |
ISE | Pot. CEC using 1M NH4Cl (BZE) | CEC, Al, Ca, Fe, H, K, Mg, Mn, Na |
ISE | Act. CEC using 0.01M BaCl2 (ISO 11260) | CEC, Al, Ca, Fe, H, K, Mg, Mn, Na |
ISE | Act. CEC using 0.1M BaCl2 (UNEP-UN/EC 91065A) | CEC, Al, Ca, Fe, H, K, Mg, Mn, Na |
ISE | Act. CEC using cobaltihexamine (AFNOR NFX 31 130) | CEC, Al, Ca, Fe, H, K, Mg, Mn, Na |
ISE | Mehlich-3 | Al, As, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, P, Pb, Zn |
ISE | Extraction with Ca-lactate (VDLUFA, Germany) | K, P |
ISE | Extraction with double lactate (VDLUFA, Germany) | K, P |
ISE | Water soluble 1:10 (w/v) (EN-12457-4) | Br, Cl, F, N - NO3 (as N) |
ISE | Extraction with 0.01M CaCl2 - 0.005M DTPA 1:10 (w/v) | Cu, Fe, Mn, Zn |
ISE | Extraction with 1M KCl 1:10 (w/v) | N - NH4 (as N), N - NO3 (as N) |
ISE | Phosphorus and related analysis | P - Ox, Al - Ox, Fe - Ox, P - AL (as P), P - w (as P), P - Bray (as P), P - Olsen (as P) |
ISE | Extraction with 1M HCl (Polish standard) | B, Cu, Fe, Mn, Zn |
ISE | Water soluble 1:10 (w/v) (Neth standard VPR C85-06) | Br, Cl, F, SO4 |
ISE | UK Soil Methods | K - NH4NO3 (1/5), Mg - NH4NO3 (1/5), P – NaHCO3 (1/20), pH - H2O (2/5) |
ISE | Extraction with dilute nitric acid (0.43 Mol/l) ISO 17586 | 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 |