Patent ID: 7448255

Claim:
A method for monitoring one or more chemicals in a boiler water system of an industrial process comprising the steps of: a. providing one or more fluorometers; b. providing a boiler water system; c. operating said boiler water system between 1500 and 2600 psig, at a saturated steam temperature from 596° F. to 674° F., and at a pH from about 7.6 to about 11.5; d. adding a known amount of one or more inert fluorescent tracers and a known amount of one or more chemicals to said industrial system, wherein said inert fluorescent tracers are selected from the group consisting of: naphthalene sulfonate and salts thereof, 1,5-naphthalenedisulfonic acid and salts thereof, anthracenedisulfonic acid salts, and a combination thereof; e. using said fluorometers to detect the fluorescence of said fluorescent tracers, wherein said fluorometers produce an output signal proportional to the detected fluorescence; f. correlating said output signal from said fluorometers to said concentration of said chemicals in said boiler water system; and optionally g. regulating the feed of said chemicals into said boiler water system based on the concentration of said chemicals.