Analytical reagent for cyanide

Details Analytical reagent for cyanide Analytical reagent for cyanide

1976-04-05

1977-04-26

Scovronek, Joseph

Chemistry: physical processes

Physical processes

Crystallization

260240R, C07D23922, C09B 5700, G01N 2102, G01N 3100

Patent

active

040198600

ABSTRACT:
In a method for the determination of cyanide wherein the cyanide is reacted with chloramine-T to form cyanogen chloride, said cyanogen chloride is reacted with pyridine to form glutaconic dialdehyde, and said dialdehyde is reacted with an organic compound to form a colored compound,
Wherein the improvement comprises employing as said organic compound, N,N'-dialkyl barbituric acid, the alkyl groups being preferably each of 1-6 carbon atoms, and especially N,N'-dimethylbarbituric acid. The latter in a solution of dimethyl sulfoxide has a shelf life of at least one year.

REFERENCES:
patent: 1996630 (1935-04-01), Shonle
patent: 2200538 (1940-05-01), Bywater
patent: 2678260 (1954-05-01), Falkof et al.
patent: 2868690 (1959-01-01), Martin et al.

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