THE ESTIMATION OF PRECISION INDICATORS OF THE TECHNIQUE METHOD OF DEFINITION OF THE MASS FRACTION OF MECHANICAL IMPURITY IN LIQUID HUMIC PREPARATIONS
The results of interlaboratory collation studies to determine the mass fraction of solids in the liquid humic preparations using the mathematical statistics data (Cochran and Grubbs criteria has been analyzed). The correctness of all conducted measurements has been shown. The data allowed to certify MVI «Methods for determination of mechanical impurities in the liquid humic preparations» in the BelGIM system. The measuring range of MM is between 0 % and 12 %. Absolute error in the specified measurement range is from 0,2 % to 1 % at P = 0,9.