Reagent for the quantitative determination of water and its use

Details Reagent for the quantitative determination of water and its use Reagent for the quantitative determination of water and its use

1982-01-13

1983-05-24

Turk, Arnold

Chemistry: analytical and immunological testing

Determination of water

By use of a karl fischer reagent

204 1T, G01N 3318

Patent

active

043851240

ABSTRACT:
Reagent for the quantitative determination of water, used together with an iodine-containing titrating solution, the reagent being free of pyridine and containing sulfur dioxide and an anhydrous alkali metal salicylate in methanol, 2-methoxyethanol or a mixture thereof in a volume ratio of at most 90 : 10 when a mixture of methanol and 2-methoxyethanol is used, which has been neutralized with an aliphatic amine for stabilizing the pH value.
This reagent is distinguished in that the increase of the blind value is restricted to a very low value even at elevated temperatures.

REFERENCES:
patent: 2967155 (1961-01-01), Blomgren et al.
patent: 3656907 (1972-04-01), Belmonte
patent: 4295990 (1981-10-01), Verbeek et al.
Scholz, E., Karl Fischer-Reagentien ohne Pyridin, Fresenius Z. Anal. Chem. 303, 203-207, (Sep. 1980).
Verhoef et al., J. Electroanal. Chem., 71 (1976) 305-315.
Peters et al., Analytical Chemistry, vol. 27, No. 3, 1955, pp. 450-453.

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