m w the labelled polymers were detected by fluorimetric methods using a spex industries inc fluorolog 2 series spectrofluorometer using right angle detection fluorescence was measured by photon counting and is reported as counts per second u201c cps u201d samples were placed in a 1 centimeter by 1 centimeter by 4 centimeter quartz cuvette and were subjected to an excitation source xenon lamp of radiation having a wavelength of 335 nanometers the fluorescence reported in table ii below is the emission fluorescence measured at 560 nanometers polymers containing pendant amine functionality were evaluated as water treatment additives in the following manner a kaolin suspension was prepared by adding to a clean dry mixing cup a 430 milliliters of water having 200 ppm of cacl 2 as caco 3 and b 0 43 grams of hydrite uf kaolin the suspension was mixed on a multimixer for 10 minutes the suspension was transferred to a clean dry glass jar and the ph of the suspension was adjusted to 8 0 with 0 05n sodium hydroxide while stirring the suspension was then divided into 100 milliliter samples to a 100 milliliter sample was added either a 0 2 milliliters of a 25 percent by weight aqueous polymer solution to form a kaolin suspension containing 5 0 ppm polymer polymer or b 0 4 milliliters of a 25 percent by weight aqueous polymer solution to form a kaolin suspension containing 10 0 ppm polymer polymer in table.