METHOD TO MEASURE SPECIFIC SURFACE OF MATERIALS Russian patent published in 2015 - IPC G01N15/08 G01N30/00 

FIELD: measurement equipment.

SUBSTANCE: previously before sorption a chamber with a source connected to a chamber with investigated material is blown with inert gas and vacuumised. Further to ensure sorption, temperature of the chamber with the source is maintained at the level of 500÷550°C, temperature of the chamber with the investigated material is maintained by 20÷30°C higher than temperature of the chamber with the source. Then both chambers are repeatedly blown with inert gas and vacuumised. And then desorption of silver is carried out by selective dissolvent at room temperature with subsequent analysis of silver quantity in the solution by spectral method. At the same time, for instance, as a selective dissolvent they may use single-molar nitric acid. And the spectral method is method of inductively coupled plasma. The sorption process is carried out for 15-30 minutes.

EFFECT: increased accuracy of specific surface measurement in dispersed, porous and compact materials with simultaneous range expansion.

4 cl, 3 dwg