Method for quantitative determination of dicarbonyl compounds

G - Physics – 01 – N

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G01N 31/22 (2006.01) G01N 21/64 (2006.01) G01N 33/53 (2006.01)

Patent

CA 2454052

The invention relates to a method for quantitative determination of alpha oxoaldehydes, especially glyoxal, methylglyoxal and 3-deoxyglucuron in liquid and gaseous samples. The method comprises two steps: the oxoaldehydes are enriched and mixed with a detection agent containing a fluorophore. The enrichment step consists in reacting oxoaldehydes with reactive groups (aminopyrazines, aminopyridines, aminopiperidines or aminoguanidines) which are immobilized on a solid phase or a water-soluble polymer. The bound aldehydes are subsequently reacted in a second step with a specific detection agent (a flurophoric antibody).

La présente invention concerne un procédé d'analyse quantitative d'alpha-oxoaldéhydes, en particulier de glyoxal, de méthylglyoxal et de 3-désoxyglucurone, dans des échantillons liquides ou gazeux. Ce procédé se déroule en deux étapes : dans un premier temps, les oxoaldéhydes sont enrichis, puis ils sont mélangés avec un réactif de détection contenant un fluorogène. L'étape d'enrichissement consiste à faire réagir les oxoaldéhydes avec des groupes réactifs (aminopyrazines, aminopyridines, aminopipéridines ou aminoguanidines) qui sont immobilisés sur une phase solide ou sur un polymère soluble dans l'eau. Les aldéhydes liés réagissent ensuite lors d'une deuxième étape avec un réactif de détection spécifique (un hydrazide fluorogène, un complexe avidine-enzyme ou un anticorps marqué).

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