Rapid colorimetric method for measuring polymers in aqueous systems
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United States of America Patent
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Apr 10, 2001
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app pub date -
Mar 26, 1999
filing date -
Mar 26, 1999
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Abstract
A method for measuring the concentration of an anionically charged polymer in an aqueous solution is described and claimed. The method requires a reagent solution that is also described and claimed. The reagent solution comprises water, Nile Blue Dye and chelant, with the chelant being selected from the group consisting of the alkali metal or ammonium salts of phosphonobutane tricarboxylic acid. The method involves using absorbance measurements to determine the amount of anionically charged polymer present in an aqueous sample. The method is very rapid and thus is very useful under field conditions.
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