摘要:
A method of automatically controlling the addition rate of Fresh Oxygen Scavenger Product and Ultimate Oxygen Scavenger Product to a Boiler System is described and claimed. The method is based on the inherent fluorometric properties of certain Fresh Oxygen Scavenger Products and certain Ultimate Oxygen Scavengers in their reduced (unreacted) form and also, for the Ultimate Oxygen Scavengers, in their oxidized (reacted) form. It has also been found possible to enhance the fluorescent signal of certain Oxygen Scavengers by adding a borate buffer to the sample stream. By using the method of the instant claimed invention it is now possible to improve the overall control of Boiler Systems using certain Fresh Oxygen Scavenger Products and certain Ultimate Oxygen Scavenger Products.
摘要:
Described and claimed is a method of controlling a cooling water system in which control is based on information from a control Matrix applicable to the specific operating parameters of the cooling water system including: (i) providing a suitable fluorometer, sufficient analytical devices and a suitable controller; (ii) programming the suitable fluorometer and controller using planning information from a control Matrix for cooling water systems being treated with treatment programs selected from the group consisting of: (d) stabilized phosphate, (e) zinc, and (f) all organic; (iii) using the fluorometer and sufficient analytical devices to determine the status of system factors; (iv) determining the pattern of changes in the readings from step (iii) over time; (v) comparing the changes in readings in steps (iii) and (iv), with the information listed in the control Matrix to determine what corrective action(s) is recommended; and (vi) using the controller to automatically implement the corrective action(s).
摘要:
A solid-state fluorometry instrument is provided. The instrument is based on either diode laser or light-emitting diode (LED) excitation sources that are capable of being used in a wide range of applications. The solid-state diode laser based fluorometer instrument monitors fluorescent tracers, particularly suitable for industrial water sample stream applications. Using the instrument, a solid-state diode laser or light-emitting diode (LED) is used as an excitation source to excite fluorescent tracer molecules. The fluorescence resulting from the diode laser excitation is imaged with a lens onto a silicon photodiode detector. An optical filter is placed between the sample cell and the photodiode detector to reject scattered laser light. The output from the photodiode is amplified to produce an output voltage proportional to the quantity of fluorescence striking the photodiode detector. Since fluorescence is proportional to the concentration of a fluorophore present in the sample stream, continuous monitoring of a voltage output may be performed which further allows real time measurement of concentration of a fluorescent tracer present in, for example, a sample stream.
摘要:
A method for determining wafer cleanliness by fluorometric monitoring of the impurities in the semiconductor chip wafer rinse solution. A clean chip is indicated by a leveling off of increased concentration of impurities as the rinsing of the chip progresses. A method for optimizing reuse or recyling of the water discharged from the rinse process which accurately measures the contaminants in that water.
摘要:
A concentration of microbiocides added to fluid systems is monitored by a fluorescence emission method which is based upon the measurement of the fluorescence intensity of an inert fluorescent additive which is added to the microbiocide composition prior to its introduction into the fluid system. Optionally, the fluorescent additive may be metered separately into the fluid system in direct proportion to the amount of industrial microbiocide added. Biocide compositions containing inert fluorescent additives are also disclosed. Preferably the fluid system is an industrial aqueous system. Preferred combinations of biocide and fluorescent additive are glutaraldehyde/1,5-naphthalene disulfonic acid, glutaraldehyde/1,3,6,8-pyrene tetrasulfonic acid, isothiazolone/1,5-naphthalene disulfonic acid, isothiazolone/1,3,6,8-pyrene tetrasulfonic acid, glutaraldehyde/fluorescein, alkyl-dimethylbenzyl ammonium chloride quaternary/2-naphthalene sulfonic acid and 2-(decylthio)-ethanamine/2-naphthalene sulfonic acid.
摘要:
A concentration-fluctuation responsive regulation of water treatment agent feed is achieved by adding an incipient to a sample whereby a concentration indicator is formed. Such a concentration indicator comprises a combination of the incipient reagent and a substantially nonfluorescent water treatment agent. The concentration indicator is then monitored by fluorescence analysis of the sample to determine at least one fluorescence emission value that can be correlated to an in-system concentration of the water treatment agent. The fluorescence emission value measured in then correlated to the in-system concentration of the water treatment agent.
摘要:
A polymer having pendant fluorescent groups is prepared by (trans)amidation of a preformed polymer by reaction with an amine-containing organic fluorescent composition of the Formula III ##STR1## wherein one of R.sub.5 and R.sup.6 may be hydrogen, and wherein within at least one of R.sub.5 and R.sub.6, or within R.sub.5 and R.sub.6 taken together, is an organic fluorescent group wherein the organic fluorescent group includes a polynuclear aromatic ring system. A degree of (trans)amidation derivatization of the polymer is accomplished by heating the admixture of polymer and fluorescent agent for a sufficient period of time. A second amine-containing post-polymerization derivatization agent other than the organic fluorescent composition of Formula III is added to the admixture or to at least a portion of the reaction product of the (trans)amidation derivatization, and is heated therewith to accomplish a degree of sequential or simultaneous post-polymerization derivatization with the second amine-containing post-polymerization derivatization agent.
摘要:
Methods for utilizing transition metals as tracers in aqueous liquid systems are provided by this invention. Transition metals with low background levels in system waters are identified as preferred when soluble in said aqueous liquid systems. The transition metals show low levels of deposition on equipment scale and provide reliable information as to the process history of the liquid systems.
摘要:
Method of determining treating agent concentration added to a water recirculating system to enhance efficiency by inhibiting scaling or corrosion or settling of particulates; the treating agent bears an amine-containing fluorescent moiety tag covalently bonded thereto, allowing sample analysis for emissivity as a measure of concentration equatable to the performance of treating agent in the system; by simultaneously employing an inert fluorescent tracer equated to the original (ppm) dosage of treating agent, consumption of the treating agent may be determined by emissivity differences equated to the original dosage.
摘要:
Polymers tagged with pendant fluorescent groups are prepared by the (trans)amidation derivatization of pre-existing polymers having carbonyl-type pendant groups. Polymers having pendant amide groups wherein the amide nitrogen is substituted with fluorescent moieties, prepared by (trans)amidation drrivatization, are provided. Polymers having pendant (sulfonated) napthalene moieties substituted to amide nitrogen are provided.