METHOD DETERMINING DEGREE OF SUBSTITUTION OF CELLULOSE Russian patent published in 1999 - IPC

Abstract RU 2139527 C1

FIELD: physical and chemical analysis. SUBSTANCE: invention can be used for quantitative analysis of proton-carrying substances in starting, intermediate and end products. Standard and analyzed samples are dried to constant mass. After this signal of free induction is excited and recorded. Time of spin-spin relaxation for each sample is found and degree of substitution is computed by corresponding formula. EFFECT: high accuracy and decreased time of analysis without destruction of sample. 1 tbl

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RU 2 139 527 C1

Authors

Gogelashvili G.Sh.

Grunin Ju.B.

Dates

1999-10-10—Published

1996-07-15—Filed