EP0320086A2
Expired / Lapsed
EP
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Visual analytical tracer and method for detection and quantitative analysis for water treatment chemicals
Assignee: Unilever PLC
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Filing: 1988-07-21
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Granted: —
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Expires: 2008-07-21
Abstract
Abstract An inert water soluble dye is added to a concentrated water treatment composition. This mixture is added to the water in a circulating water system such as a cooling tower. The concentration of the dye and the concentration of the actives in the treatment composition are proportionate to each other. The concentration of the treatment composition in the water system can be determined by measuring the percentage of light absorbed by the dye in the water. This can be determined by use of a colorimeter. Fluorescein is the preferred dye.
Inventors
- 👤 Gary L. Baker
- 👤 Ronald J. Christensen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N21/643; C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; G01N33/00; G01N33/18; C02F2103/00; C02F2103/02; C02F2103/023; G01N2021/6439
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
A method of detecting the concentration of a treatment composition present in the water in a water system comprising adding a mixture into the water, the mixture comprising a known amount of an inert water soluble dye and a known amount of the treatment composition, and detecting the concentration of the treatment composition present in the water by detection of the concentration of the inert dye in the treated water in the system.
Claim 2
Independent Claim
73 words
A method of detecting the concentration of a treatment composition present in the water in a water system comprising adding a mixture into the water, the mixture comprising a known amount of an inert water soluble dye and a known amount of the treatment composition, and detecting the concentration of the treatment composition present in the water by detection of the concentration of the inert dye in the treated water in the system.
Claim 3
Dependent Claim
14 words
A method as claimed in Claim 1 wherein the dye is a photodegradable dye.
Claim 4
Dependent Claim
20 words
A method as claimed in Claim 1 or 2 wherein the dye is fluorescein, Rhodamine B, Rhodamine WT or Lissamine.
Claim 5
Independent Claim
24 words
A method as claimed in any of the preceding claims wherein the dye is fluorescein, maintained at concentration levels between 0.3 and 3.0 ppm.
Claim 6
Dependent Claim
25 words
A mixture of a water soluble water treatment agent having a known concentration of actives and an inert water soluble dye having a known concentration.
Claim 7
Dependent Claim
25 words
A mixture of a water soluble water treatment agent having a known concentration of actives and an inert water soluble dye having a known concentration.
Claim 8
Dependent Claim
13 words
A mixture as claimed in Claim 5 wherein the inert dye comprises fluorescein.
Claim 9
Independent Claim
21 words
A method as claimed in any of Claims 1 to 4 wherein the concentration of said dye is detected by photodetection.
Claim 10
Independent Claim
22 words
A method as claimed in any of Claims 1 to 4 or 7 wherein the concentration of the dye is visually detected.
Claim 11
Independent Claim
30 words
A method as claimed in any of Claims 1 to 4; 7 or 8 wherein the water system is a water cooling tower, evaporative condenser, boiler or chilled water system.
References Cited (Backward Citations)
No citation records indexed.
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