Method for the continuous determination of dimethylformamide and

Details Method for the continuous determination of dimethylformamide and Method for the continuous determination of dimethylformamide and

1990-10-10

1992-08-11

Lacey, David L.

Chemistry: analytical and immunological testing

Automated chemical analysis

With a continuously flowing sample or carrier stream

436106, 436111, 436181, G01N 2514, G01N 2700

Patent

active

051378310

ABSTRACT:
Method for the continuous determination of dimethylformamide and dimethylamine in aqueous solutions, especially in effluents. A method for the continuous determination of the amount of dimethylformamide in a solution containing dimethylformamide, the amount of dimethylamine in a solution containing dimethylamine, and the combined amount of dimethylformamide and dimethylamine in a solution contained in aqueous solutions, especially in plant effluents, is described, which comprises continuously taking a constant part stream from the effluent stream, hydrolyzing the part stream under alkaline conditions with an alkali solution added at a constant rate under constant conditions, subjecting it to partial vaporization conditions, condensing the resulting vapor stream by cooling, determining the electrical conductivity in the condensate continuously in a flow cell and converting the measured values obtained into the desired concentration values by reference to a calibration curve or known equations.

REFERENCES:
Houben-Weyl, "Methoden der Organischen Chemie", Physikalische Methoden, vol. 3, part 2, p. 8, 1955.

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