METHOD FOR DETERMINING THE COMPARATIVE PROPERTIES OF AN OBJECT CONTAINING CELLULOSE BY MEANS OF REGRESSION ANALYSIS OF THE PROPERTIES OF CELLULOSE DETERMINED BY THE PULSED NMR SPECTROSCOPY METHOD

摘要

FIELD: measuring.;SUBSTANCE: area of application: determining the comparative properties of an object containing cellulose. The substance of the invention consists in the fact that in the process of conducting the examination, in order to prepare samples, the surface layer of the cellulose-containing material of the object of examination is sampled in coated sections and in uncoated sections in the form of disks with a diameter in the range of 0.3 to 0.55 mm and a thickness of no less than 0.03 mm using a punch tool with an external diameter of no more than 0.6 mm, then a cellulose sample is extracted from each obtained sample of the cellulose-containing material under a microscope, each cellulose sample is placed in a separate container (clean test tube) and placed in a pulsed NMR spectrometer, wherein the averaged crystallinity indices are determined based on the data of said spectrometer in the cellulose collected in the coated sections and in the cellulose in the uncoated sections, the proton density in the cellulose in the uncoated sections, and the proton density in the cellulose in the coated sections, calculated based whereon is the relative value of change in the parameters of the cellulose according to a given formula, wherein the above actions and calculations are performed for the examined object and the standard object, or the object whereto the primary object of examination is compared, then, in the process of analysis, the regression dependence of the parameters of the examined objects (the regression line) is determined and the maximum mutual deviation of the regression lines is calculated.;EFFECT: provided possibility of reducing the examination time, as well as provided possibility of application in multiple areas, including determining the comparative remoteness of the date of creation of the objects of examination.;1 cl, 4 dwg, 5 tbl