Chemistry: analytical and immunological testing – Process or composition for determination of physical state... – Surface area – porosity – imperfection – or alteration
Patent
1988-11-25
1992-03-17
Fisher, Richard V.
Chemistry: analytical and immunological testing
Process or composition for determination of physical state...
Surface area, porosity, imperfection, or alteration
324317, 436173, G01N 2400
Patent
active
050968262
ABSTRACT:
A method for determining the specific surface of a porous or a powdery substance includes measuring the spin-lattice relaxation rate of impregnating agent protons, in which the impregnating agent is removed from a specimen of the impregnated, examined substance at a pressure below the saturated vapor pressure of the impregnating agent. The effective spin-lattice relaxation time T.sub.1,ef of impregnating agent protons is measured at several impregnating agent levels of the specimen and the specific surface of the examined substance is determined according to a given equation.
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Barbic Lenart
Godina Magda
Bruckner John J.
Fisher Richard V.
Salonit Anhovo, industrija gradbenega materiala, n.sol.o
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