APPLIED ASPECTS OF CREATION OF A BRANCH REFERENCE MATERIAL OF STRUCTURE (AGROCHEMICAL INDICATORS) CHERNOZEM TYPICAL

Abstract

Carried out analysis of the reference material’ development issues current status. Specific development procedure has been formulated based on the analysis of literature and experience in the development of reference material’s individual types. The most common way of assessing the uniformity of a Reference Material now is to use the dispersion analysis to isolate the components of the dispersion associated with the error in the heterogeneity of the Reference material. The method makes it possible to estimate the characteristics of the inhomogeneity error within one laboratory. The normal distribution of experimental data is realized in practice quite rarely, as shown by theoretical studies and practical experience, although it is used universally in calculations. Carried out a comparative analysis of various methods for estimating the metrological characteristics of a Reference materials based on the results of interlaboratory analysis. In difference from many other similar probes it is in-process used not idealized, but the empirical distributions received by results of interlaboratory analyses. The mean of establishment of a period of Reference materials validity by results of the experimental researches, grounded on interval estimation of speed of change of the certified performance is tendered.