METHOD OF PREPARING MODEL REFERENCE MATERIALS OFSOILS CONTAMINATED BY HEAVY METALS
The developed technique for the preparing standard samples (reference materials) of soil composition based on the natural soils containing mobile forms of heavy metals in concentrations exceeding the background level is designed to control the quality of heavy metals measurements in soils by agricultural laboratories. The metrological characteristics, i.e. homogeneity and time stability, the complex of the factors affecting the homogeneity of the developed standard samples (reference materials) of soil composition are identified.