Field test method for estimation of concentration of organic materials in water
AssigneeThe Sherwin-Williams Company
InventorClare B. Proudfoot
Life of this patent
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Abstract
This invention relates to use of adsorption resins and ion exchange resins to separate selected organic materials and quantify their concentration in an aqueous solution based upon comparison to a visual standard. This process can be carried out in a relatively short time period and does not require special electronic equipment. Therefore, it can be conveniently used as a field test method to determine concentration of organic materials in aqueous solutions. This invention is especially useful in quantifying the concentration of triazoles in industrial cooling water.
Claims2
A visual standard useful in the quantitative identification of concentrations of triazoles in aqueous solutions by visual determination, said standard comprising a series of colored metal ion triazole complexes, each element in the series having a concentration incrementally varied from the others, wherein each element of the series is prepared by a process which comprises:
- (a) passing an aqueous solution having a known concentration of triazole through an ion exchange resin, wherein said ion exchange resin is in metal ion form and wherein said metal ions are reactive towards said triazole;
- and
- (b) eluting excess metal ions from said ion exchange resin by addition of an effective amount of an aqueous inorganic salt to expose the adsorbed metal ion triazole colored product.
A test kit useful for the quantitative identification of concentrations of triazoles in aqueous solutions said test kit comprising:
- 1. a plurality of columns containing a non-ionic macroreticular resin;
- and
- 2. a plurality of columns containing an acidic cationic ion exchange resin in metal ion form;
- and
- 3. containers containing solvents capable of eluting triazole which is adsorbed onto the macroreticular resin;
- and
- 4. a container containing an aqueous inorganic salt solution capable of washing excess metal ion from the acidic cationic ion exchange resin;
- and
- 5. a visual standard useful in the quantitative determination of concentrations of triazoles by visual comparison, said standard comprising a series of colored metal ion triazole complexes, each element in the series having a concentration incrementally varied from the others, wherein each element of the series is prepared by a process which comprises:
- (a) passing an aqueous solution having a known concentration or triazole through an ion exchange resin, wherein said ion exchange resin is in metal ion form and wherein said metal ions are reactive towards said triazole;
- and
- (b) eluting excess metal ions from said ion exchange resin by addition of an effective amount of an aqueous inorganic salt to expose the adsorbed metal ion triazole colored product.
Dependencies are inferred from the claim text.