G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 31/22 (2006.01) G01N 21/31 (2006.01) G01N 21/78 (2006.01) G01N 21/80 (2006.01)
Patent
CA 2420213
The invention is directed to a method of detecting hydrogen radicals present in water or an aqueous solution, characterized in adding sodium salt of 3,5-dibromo-4-nitrosobenzenesulfonic acid (DBNBS) to a sample for detecting the hydrogen radicals by coloring resulting from absorption characteristics thereof, and further characterized in blowing hydrogen gas into a solution of 1,1-diphenyl-2-picrylhydrazyl (DPPH) having absorption in the vicinity of 517 nm and a solution of sodium salt of 3,5-dibromo-4- nitrosobenzenesulfonic acid (DBNBS) at a constant speed in the presence of platinum black for quantitatively analyzing the concentration of the hydrogen radicals from a calibration curve C of a graph of correlation between absorbance in the vicinity of 450 nm derived from a DBNBS azo compound and the concentration of the formed hydrogen radicals.
L'invention porte: sur un procédé de détection de radicaux hydrogène dans l'eau ou dans une solution aqueuse consistant à ajouter un sel de sodium de l'acide 3,5-dibromo-4-nitrosobenzènesulfonique (DBNBS) à un échantillon et à détecter la couleur de la solution résultante; sur un procédé d'analyse quantitative de radicaux hydrogène consistant à insuffler de l'hydrogène gazeux dans une solution de 1,1-diphényl-2-picrylhydrazyle (DPPH) présentant une absorption proche de 517 nm, et dans une solution de sel de sodium de l'acide 3,5-dibromo-4-nitrosobenzènesulfonique (DBNBS) en présence de noir de platine, à débit constant, puis à déterminer la concentration en radicaux hydrogène à l'aide de la courbe d'étalonnage d'un graphique illustrant la relation entre l'absorbance pour l'absorption proche de 450 nm d'un composé azo de DBNBS et la concentration en radicaux hydrogène.
Otsubo Kazumichi
Shirahata Sanetaka
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Nihon Trim Co. Ltd.
Shirahata Sanetaka
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