Karl Fischer titration agent and method

Details Karl Fischer titration agent and method Karl Fischer titration agent and method

1983-12-05

1988-04-26

Richman, Barry S.

Chemistry: analytical and immunological testing

Determination of water

By use of a karl fischer reagent

204 1T, G01N 3318

Patent

active

047404710

ABSTRACT:
For the titrimetric determination of small amounts of water, a Karl Fischer reagent is used which contains sulfur dioxide, iodine and a nitrogen base as essential components. The use of specific nitrogen bases in place of pyridine, which is conventionally used, is advantageous. Particularly suitable are selected aliphatic amines and nitrogen-containing heterocyclic compounds, especially imidazoles. The pyridine-free titration agent is distinguished by high storage stability and can be used as a bicomponent or monocomponent reagent.

REFERENCES:
patent: 2967155 (1961-01-01), Blomgren et al.
patent: 3656907 (1972-04-01), Delmonte
patent: 3661797 (1972-05-01), Meloan et al.
patent: 4005983 (1977-02-01), Dahms
patent: 4378972 (1983-04-01), Scholz
patent: 4385124 (1983-05-01), Verbeek et al.
patent: 4429048 (1984-01-01), Scholz
Johansson, Analytical Chemistry, vol. 28, No. 7, 1166-1168, (1956).
Smith et al., J. Am. Chem. Soc., vol. 61, 2407-2412, (1939).
Verhoff et al., Analytica Chimica Acta, vol. 94, 395-403, (1977).

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