Chemistry: physical processes – Physical processes – Crystallization
Patent
1976-08-12
1977-08-02
Serwin, R.E.
Chemistry: physical processes
Physical processes
Crystallization
23230M, 252408, G01N 3318, G01N 2120
Patent
active
040392848
ABSTRACT:
A formulation for colorimetric determination of the concentration of cyanuric acid compounds, particularly in swimming pool water, comprises an aqueous solution of a stabilizer, monoethanolamine and a thymolsulfonphthalein compound which, in aqueous solution with monoethanolamine, will exhibit different characteristic color shades dependent upon the concentration of cyanuric acid compounds. The stabilizer is a water-soluble, ultraviolet light absorbing material which is a condensation product of a disulfonic acid derivative with stilbene, stilbyle or their derivatives.
A method of testing for cyanuric acid compound concentrations is to mix the formulation with a sample of swimming pool water and compare the resultant characteristic color shade with a standard color shade.
REFERENCES:
morales, "Potentiometric Titrations of Cyanuric Acid and Melamine in Dimethylsulfoxide," Analytical Chem., vol. 40, No. 7, June 1968, pp. 1148-1149.
Coastal Industries, Inc.
Serwin R.E.
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