SOIL - ISE

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Participation in the International Soil-Exchange Programme (ISE) is open to all laboratories. The normal validated methods and procedures of each laboratory should be used to analyse the test materials. Laboratories are requested to fill in method information codes (MIC) for each determinand. This allows laboratories to review the range and similarity of the methodologies used.

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Test programmeSoil

Number of rounds

4 per year

Number of samples

4 per round

Sample size

100 g

Origin

Natural source

Excercise name

ISE

  1. Test programme

    Number of rounds

    Soil

    4 per year

  2. Test programme

    Number of samples

    Soil

    4 per round

  3. Test programme

    Sample size

    Soil

    100 g

  4. Test programme

    Origin

    Soil

    Natural source

  5. Test programme

    Excercise name

    Soil

    ISE

General Information

  • The sample types/matrices are chosen to represent the materials which you normally analyse. There is no spiking or use of artificial samples.
  • The soil samples are dried at max. 40°C, milled and sieved to <0.5 mm.
  • The homogeneity of each batch of samples is tested on a selection of parameters.
  • The dried soil samples are stable over a number of years when stored at room temperature.
  • You analyze the test materials according to your normal validated methods and procedures for those elements and parameters you are interested in.
  • Your results are processed at WEPAL-QUASIMEME and published every three months under confidential code names.
  • The reports contain all data, statistical evaluation including Z-score plots and method information about the methods used by the laboratories.
  • The reports are available within one month after the submission deadline.
  • New determinands can be added on request.

Determinands

The list below shows the typical determinand groups and determinands for the International Soil analytical Exchange Programme. For a list of determinands which are under the scope of accreditation please check here.


Analyte group Typical analytes

Real totals    

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

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

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

Extraction with boiling 2M HNO3

Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Tl, Zn

Extraction with 0.1M NaNO3

Cd, Cu, Ni, Pb, Zn

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

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

Other determinations

B - Hot water, CN - Free, CN - Total, delta 13C, delta 15N, K - HCl (as K), Mg - NaCl (as Mg), Moisture-content

Fluoride (Swiss standard procedure)

F - Total

Pot. CEC using 1M NH4-acetate at pH=7

CEC, Al, Ca, K, Mg, Na

Pot. CEC using 1M or 0.1M BaCl2-TEA at pH=8.1 (ISO 13536 OR BZE)

CEC, Al, Ca, K, Mg, Na

Pot. CEC using 1M NH4Cl (BZE)

CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

Act. CEC using 0.01M BaCl2 (ISO 11260)

CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

Act. CEC using 0.1M BaCl2 (UNEP-UN/EC 91065A)

CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

Act. CEC using cobaltihexamine (AFNOR NFX 31 130)

CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

Mehlich-3

Al, As, B, Ca, Cd, Cr, Co, Cu, Fe, K, Mg, Mn, Na, P, Se, Pb, Zn

Extraction with Ca-lactate (VDLUFA, Germany)

K, P

Extraction with double lactate (VDLUFA, Germany)

K, P

Water soluble 1:10 (w/v) (EN-12457-4)

Br, Cl, F, N - NO3 (as N)

Extraction with 0.01M CaCl2 - 0.005M DTPA 1:10 (w/v)

Cu, Fe, Mn, Zn

Extraction with 1M KCl 1:10 (w/v)

N - NH4 (as N), N - NO3 (as N)

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)

Extraction with 1M HCl (Polish standard)

B, Cu, Fe, Mn, Zn

Water soluble 1:10 (w/v) (Neth standard VPR C85-06)

Br, Cl, F, SO4

UK Soil Methods

K - NH4NO3 (1/5), Mg - NH4NO3 (1/5), P – NaHCO3 (1/20), pH - H2O (2/5)

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

  1. Analyte group

    Real totals    

    Typical analytes

    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

  2. Analyte group

    Acid extractable (So-called totals)    

    Typical analytes

    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

  3. Analyte group

    Aqua Regia (ISO 11466)

    Typical analytes

    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

  4. Analyte group

    Extraction with boiling 2M HNO3

    Typical analytes

    Cd, Co, Cr, Cu, Hg, Mo, Ni, Pb, Tl, Zn

  5. Analyte group

    Extraction with 0.1M NaNO3

    Typical analytes

    Cd, Cu, Ni, Pb, Zn

  6. Analyte group

    Extraction with 0.01M CaCl2 1:10

    Typical analytes

    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

  7. Analyte group

    Soil characteristics

    Typical analytes

    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

  8. Analyte group

    Other determinations

    Typical analytes

    B - Hot water, CN - Free, CN - Total, delta 13C, delta 15N, K - HCl (as K), Mg - NaCl (as Mg), Moisture-content

  9. Analyte group

    Fluoride (Swiss standard procedure)

    Typical analytes

    F - Total

  10. Analyte group

    Pot. CEC using 1M NH4-acetate at pH=7

    Typical analytes

    CEC, Al, Ca, K, Mg, Na

  11. Analyte group

    Pot. CEC using 1M or 0.1M BaCl2-TEA at pH=8.1 (ISO 13536 OR BZE)

    Typical analytes

    CEC, Al, Ca, K, Mg, Na

  12. Analyte group

    Pot. CEC using 1M NH4Cl (BZE)

    Typical analytes

    CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

  13. Analyte group

    Act. CEC using 0.01M BaCl2 (ISO 11260)

    Typical analytes

    CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

  14. Analyte group

    Act. CEC using 0.1M BaCl2 (UNEP-UN/EC 91065A)

    Typical analytes

    CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

  15. Analyte group

    Act. CEC using cobaltihexamine (AFNOR NFX 31 130)

    Typical analytes

    CEC, Al, Ca, Fe, H, K, Mg, Mn, Na

  16. Analyte group

    Mehlich-3

    Typical analytes

    Al, As, B, Ca, Cd, Cr, Co, Cu, Fe, K, Mg, Mn, Na, P, Se, Pb, Zn

  17. Analyte group

    Extraction with Ca-lactate (VDLUFA, Germany)

    Typical analytes

    K, P

  18. Analyte group

    Extraction with double lactate (VDLUFA, Germany)

    Typical analytes

    K, P

  19. Analyte group

    Water soluble 1:10 (w/v) (EN-12457-4)

    Typical analytes

    Br, Cl, F, N - NO3 (as N)

  20. Analyte group

    Extraction with 0.01M CaCl2 - 0.005M DTPA 1:10 (w/v)

    Typical analytes

    Cu, Fe, Mn, Zn

  21. Analyte group

    Extraction with 1M KCl 1:10 (w/v)

    Typical analytes

    N - NH4 (as N), N - NO3 (as N)

  22. Analyte group

    Phosphorus and related analysis

    Typical analytes

    P - Ox, Al - Ox, Fe - Ox, P - AL (as P), P - w (as P), P - Bray (as P), P - Olsen (as P)

  23. Analyte group

    Extraction with 1M HCl (Polish standard)

    Typical analytes

    B, Cu, Fe, Mn, Zn

  24. Analyte group

    Water soluble 1:10 (w/v) (Neth standard VPR C85-06)

    Typical analytes

    Br, Cl, F, SO4

  25. Analyte group

    UK Soil Methods

    Typical analytes

    K - NH4NO3 (1/5), Mg - NH4NO3 (1/5), P – NaHCO3 (1/20), pH - H2O (2/5)

  26. Analyte group

    Extraction with dilute nitric acid (0.43 Mol/l) ISO 17586

    Typical analytes

    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

Reference materials

Samples of previous proficiency tests are sold as reference materials. Available materials can be selected and ordered in our webshop. In our webshop it is also possible to request a quotation. Participants of our proficiency tests are entitled to a discount.