Methods and devices for detecting isothiazolones
AssigneeGeneral Electric Company
InventorDavid James Monk
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Abstract
Methods for quantitative determination of the presence of isothiazolone compounds in a solution include controlling pH of the solution in a range from about 3 to about 10, combining a known quantity of the pH-adjusted solution with a known quantity of an aromatic thiolate anion, quantitatively determining color intensity of the resultant combined solution; and correlating the color intensity with amount of isothiazolone compounds. The methods may be used in automated systems, including systems utilizing optical sensor devices.
Claims13
A method for quantitative determination of the presence of isothiazolone compounds in a solution, said method comprising
- controlling pH of the solution in a range from 3 to 10;
- combining a known quantity of the pH-adjusted solution with a known quantity of an aromatic thiolate anion in a basic solution having a concentration of hydroxide ion ranging from 0.03N to 0.6N;
- quantitatively determining color intensity of the resultant combined solution;
- and
- correlating the color intensity with amount of isothiazolone compounds;
- wherein color intensity reaches a minimum value after less than 20 minutes and is stable for at least 30 minutes thereafter.
Dependencies are inferred from the claim text.