Azo dye aqueous solution, preparation method and use

Details Azo dye aqueous solution, preparation method and use Azo dye aqueous solution, preparation method and use

G - Physics

01

N

G01N 31/22 (2006.01) G01N 33/18 (2006.01)

Patent

CA 2342734

The invention concerns a stable aqueous solution (A) comprising an azo dye, whereof the colouring action or the intensity of the colouring action is modified in the presence of chlorine dioxide, a borate buffer solution and one or several masking agent(s). The invention also concerns a method for preparing said solution and its use for determining residual chlorine dioxide in water.

La présente invention se rapporte à une solution aqueuse (A) stable comprenant un colorant azoïque, dont la coloration ou l'intensité de cette coloration est modifiée en présence de dioxyde de chlore, un tampon borate et un ou plusieurs agent(s) masquant(s), son procédé de fabrication et son utilisation dans la détermination du dioxyde de chlore résiduel dans l'eau.

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