| http://www.w3.org/ns/prov#value | - A method for the analysis of ionic surfactants present in an aqueous solution including the steps of: obtaining a known volume sample of the aqueous solution to be tested; adding a standard, cationic, nonaromatic quarternary ammonia solution to the sample in a known amount sufficient to ensure a cationic character to the sample independent of its original condition; adding buffer solution, indicat
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