The test method specifies determination of Mg, Al, Si, Zn, P, S, Cl, K, Ca, Ba, Ti, Cr, Mn, Fe, Ni, Br, Rb, Sr in specially prepared powder samples of vegetable material by X-ray fluorescence method.
Materials suitable for analysis are listed below corresponding:
- Tea products ;
- Tobacco products;
- Corn products and wastes;
- Kids, dietician, health-protection dry nutrition and wastes;
- Spices, spicy additives, concentrates and wastes;
- Vegetable and animal medical plants raw and products;
- Agricultural and forestry products.
Mg, Al, Si, Zn, P, S, Cl, K, Ca, Ba, Ti, Cr, Mn, Fe, Ni, Br, Rb, Sr determination in plant materials
Analysis is run for sample material selected according to corresponding regulations and norms. The test method does not specify sampling procedure.
After sampling the material shall be dried in an air bath, and grinded to the particle size ≤71 micron.
Two concurrebt samples shall be analyzed. The samples are pressed 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 put into the sample holder and then into spectrometer. Analysis is carried out automatically according to the chosen program. The program can determine all elements listed in the test method or some of those elements by choice.
After sampling the material shall be dried in an air bath, and grinded to the particle size ≤71 micron.
Two concurrebt samples shall be analyzed. The samples are pressed 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 put into the sample holder and then into spectrometer. Analysis is carried out automatically according to the chosen program. The program can determine all elements listed in the test method or some of those elements by choice.
Concentration range specified by the test method is listed in the table. All elements can be determined from the same sample material.
| Element | Measurement units | Concentration range,
from – up to |
| Mg | % | 0,25-0,45 |
| Al | % | 0,065-0,10 |
| Si | % | 0,40-1,1 |
| P | % | 0,10-1,0 |
| S | % | 0,10-0,35 |
| Cl | % | 0,10-0,55 |
| K | % | 0,10-3,5 |
| Ca | % | 0,05-2,8 |
| Ba | mg/kg
| 65-250 |
| Ti | mg/kg
| 100-800 |
| Cr | mg/kg
| 5-30 |
| Mn | mg/kg
| 10-1500 |
| Fe | mg/kg
| 20-2600 |
| Ni | mg/kg
| 10-50 |
| Zn | mg/kg
| 15-100 |
| Br | mg/kg
| 25-55 |
| Rb | mg/kg
| 25-100 |
| Sr | mg/kg
| 40-1000 |
| Laboratory grinder LDI-65
desk top laboratory grinder. The grinder is used for uniform grinding of sample material. The grinder is recommended for powder sample preparation for XRFA. It provides required particle size, and uniform grinding. The grinding plates do not introduce additional elements into the sample material, therefore does not add errors to analysis. |  |
| Hydraulic laboratory press PGR - 10
desk top manually operated hydraulic press is recommended for powder sample pressing to improve analysis results. There are two modifications differ in available stresses – either from 0 to 10 ton or from 0 to 20 ton. The modification is chosen dependent on the material for analysis and customer analytical task. The delivery set includes molders of various diameters dependent on the analytical task. | ПГР - 10
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Agate mortar
The mortar is used for manual suspension and powder grinding, as well as for mixing small portions of substances used in scientific research. |  |
