V, Cr, Co, Ni, Cu, Zn, As, Sr and Pb, MgO, Al2O3, SiO2, P2O5, K2O, CaO, TiO2, MnO, Fe2O3 determination in soil
The test material shall be cleaned from roots, big stones, glass and so on.
10-50 grams of the cleaned sample material is dried till constant weight at temperature of 105± 2°C.
Dry sample material is grinded with a disk grinder or agate mortar till ≤71 micron particles size.
Analysis includes two measurements of two concurrent samples of the same sample material. The samples may be prepared two following ways.
Filling the sample cup
Sample material is filled in a standard sample cup delivered with spectrometer. The powder is compressed till smooth flat surface at the cup edge level is obtained. The cup is covered with 5 micron thick polyethyleneterephtalate film. The film is fixed with rings included in the sample cup set.
Pressing in a boron acid cup
Boron acid cup is pressed out with a shaped punch being at least 3 mm deep. Sample material is put into the cup and pressed with a flat punch into a pellet.
The sample cup or the pellet is put into the sample holder and then into a spectrometer. Analysis is carried out automatically according to the chosen program. The program can determine all elements (oxides) listed in the test method or some of those elements by choice.
Mass content determination of all metal and metal oxides is obtained from one sample.
Measurement range
| Element | Unit of measurement | Concentration rage of the component |
| MgO | % | From 0.20 up to 3.0 |
| Al2O3 | % | From 3 up to 18 |
| SiO2 | % | From 50 up to 92 |
| P2O5 | % | From 0.035 up to 0.21 |
| K2O | % | From 0.9 up to 2.6 |
| CaO | % | From 0.20 up to 12 |
| TiO2 | % | From 0.25 up to 1.6 |
| V | mg/kg | Over 10 up to 180 |
| Cr | mg/kg | From 80 up to 180 |
| MnO | mg/kg | From 100 up to 950 |
| Fe2O3 | % | From 1.0 up to 8.0 |
| Co | mg/kg | From 10 up to 150 |
| Ni | mg/kg | From 10 up to 380 |
| Cu | mg/kg | From 20 up to 310 |
| Zn | mg/kg | From 10 up to 610 |
| As | mg/kg | From 21 up to 70 |
| Sr | mg/kg | Over 50 up to 310 |
| Pb | mg/kg | From 30 up to 280 |