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US 4,227,888 AGranted
Method for the quantitative determination of cyanide
AssigneeMonsanto Company
InventorsMelvin L. Rueppel, Chihyuan C. Ting
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Abstract
A method for quantitatively determining the cyanide content of aqueous solution containing aldehydes and/or ketones as a measure of the sum of the free cyanide and cyanohydrin content. The method comprises converting cyanohydrin to free cyanide and then determining the free cyanide content of the solution.
Claims9
A method for quantitatively determining the cyanide content of a solution containing interfering aldehydes and/or ketones which comprises sequentially the steps of
- (a) treating the solution with an amount of a compound of the formula
- R - NH.sub.2
- wherein R is selected from the group consisting of hydroxyl, lower alkoxy and ##STR6## wherein R.sub.1 and R.sub.2 are independently hydrogen or any radical which does not contain groups capable of being hydrolyzed to hydrogen cyanide;
- sufficient to react with the total aldehyde and ketone content;
- (b) maintaining the pH of the solution at a level sufficient to convert any cyanohydrin to free cyanide,
- (c) means for quantitatively determining the level of free cyanide as a measure of the cyanide content of the solution.
3 more elements
Dependencies are inferred from the claim text.