METHOD OF DETERMINATION OF DIMETHYLFORMAMIDE IN AIR Russian patent published in 1995 - IPC

Abstract RU 2045061 C1

FIELD: analytical chemistry. SUBSTANCE: method involves preliminary activation of silica gel by boiling in 15-18% hydrochloric acid solution at their volume ratio 1:2, washing out of chloride ions with water and drying firstly at 95-105 C and then at 150 C for 1 h. Then air analyzed mixture is passed and dimethylformamide is eluted with aqueous-spirituous mixture followed by alcohol evaporation. EFFECT: improved method of assay. 2 tbl

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RU 2 045 061 C1

Authors

Akhmetova T.I.

Galljamova Eh.I.

Gizzatullin R.R.

Kijanenko G.V.

Dates

1995-09-27—Published

1992-06-18—Filed