Scope - WEPAL

WEPAL/QUASIMEME is accredited for the organisation of Inter laboratory Studies by the Dutch Accreditation Council RvA since April 26, 2000. WEPAL’s registration number is R002. The accreditation is based on the ISO/IEC-requirements (General requirements for proficiency testing, ISO/IEC 17043:2010). The scope of accreditation can be found on the website of RvA.

The accreditation covers the quality system of the organisation as well as the determinand groups printed in bold in the first column in the table below. Within these determinand groups only the determinands printed in bold in the second column meet the criteria for accreditation. These criteria are based on information about the homogeneity and stability of the samples. This information is available when sufficient participants have reported results for a determinand in the past 3 years. Determinands which are not reported regularly in sufficient numbers to have a statistical evaluation are not (yet) included in the scope of the accreditation.

Scope of the WEPAL programmes. (Determinands not in bold are not in the scope of the accreditation).

ProgramDeterminand groupDeterminand
ISEReal totalsAg, 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
ISEAcid 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, C
ISEAqua 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, 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
ISEExtraction with boiling 2M HNO3Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Tl, Zn
ISEExtraction with 0.1M NaNO3Cd, Cu, Ni, Pb, Zn
ISEExtraction with 0.01M CaCl2 1:10Al, 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
ISESoil characteristicsC - 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
ISEOther determinationsB - Hot water, CN - Free, CN - Total, delta 13C, delta 15N, K - HCl (as K), Mg - NaCl (as Mg), Moisture-content, 13C, 15N
ISEFluoride (Swiss standard procedure)F - Total
ISEDigestion with conc. HNO3 + conc. HCl + H2O2 (UNEP-UN/EC 91075A)Al, As, B, Ba, Be, Br, Ca, Cd, Co, Cr, Cu, F, Fe, Ga, Hg, I, K, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Rb, S, Sb, Se, Si, Sn, Sr, Tl, V, Y, Zn, Zr
ISEPot. CEC using 1M NH4-acetate at pH=7CEC, Al, Ca, K, Mg, Na
ISEPot. CEC using 1M or 0.1M BaCl2-TEA at pH=8.1 (ISO 13536 OR BZE)CEC, Al, Ca, K, Mg, Na
ISEPot. CEC using 1M NH4Cl (BZE)CEC, Al, Ca, Fe, H, K, Mg, Mn, Na
ISEAct. CEC using 0.01M BaCl2 (ISO 11260)CEC, Al, Ca, Fe, H, K, Mg, Mn, Na
ISEAct. CEC using 0.1M BaCl2 (UNEP-UN/EC 91065A)CEC, Al, Ca, Fe, H, K, Mg, Mn, Na
ISEAct. CEC using cobaltihexamine (AFNOR NFX 31 130)CEC, Al, Ca, Fe, H, K, Mg, Mn, Na
ISEMehlich-3Al, As, B, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, P, Pb, Zn
ISEExtraction with Ca-lactate (VDLUFA, Germany)K, P
ISEExtraction with double lactate (VDLUFA, Germany)K, P
ISEWater soluble 1:10 (w/v) (EN-12457-4)Br, Cl, F, N - NO3 (as N)
ISEExtraction with 0.01M CaCl2 - 0.005M DTPA 1:10 (w/v)Cu, Fe, Mn, Zn
ISEExtraction with 1M KCl 1:10 (w/v)N - NH4 (as N), N - NO3 (as N)
ISEPhosphorus and related analysisP - Ox, Al - Ox, Fe - Ox, P - AL (as P), P - w (as P), P - Bray (as P), P - Olsen (as P)
ISEExtraction with 1M HCl (Polish standard)B, Cu, Fe, Mn, Zn
ISEWater soluble 1:10 (w/v) (Neth standard VPR C85-06)Br, Cl, F, SO4
ISEUK Soil MethodsK - NH4NO3 (1/5), Mg - NH4NO3 (1/5), P – NaHCO3 (1/20), pH - H2O (2/5), lime requirement (CaCO3)
ISEExtraction with dilute nitric acid (0.43 Mol/l) ISO 17586Ag, 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