Improved method for the determination of lipase

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/44 (2006.01)

Patent

CA 2237888

The invention concerns a method and a reagent for determining lipase in the presence of a colored substrate and at least one N-substituting carboxamide derivative or a mixture of the general formula (I) or (Ia), in which R1 and R2 independently represent hydrogen or a saturated or non-saturated, substituting or non-substituting hydrocarbon residue with 2 to 24 carbon atoms, Z a saturated or non-saturated, substituting, cyclic or linear-chain hydrocarbon residue with 1 to 10 carbon atoms, X an atom or atom group with positive charge and n a figure ranging from 1 to 3. Specially tetranatrium-N-(1,2-dicarboxylethyl)-N-alkyl-sulfo-- succinamide or a mixture containing such compound has proven to be quite advantageous in eliminating unspecified reactions during the determination of lipase in a biological test sample.

L'invention concerne un procédé et un produit réactif pour la détermination de lipase en présence d'un substrat coloré et au moins un dérivé d'amide d'acide carboxylique N-substitué ou d'un composé de formule générale (I) ou (Ia), dans laquelle R<1> et R<2> indépendamment l'un de l'autre représentent hydrogène ou un radical hydrocarbure saturé ou insaturé, substitué ou non substitué, comportant 2 à 24 atomes de carbone, Z représente un radical hydrocarbure saturé ou insaturé, substitué, cyclique ou à chaîne linéaire, comportant 1 à 10 atomes de carbone, X représente un atome ou une groupe atomique à charge positive et n représente un nombre compris entre 1 et 3. Le tétrasodium-N-(1,2-dicarboxyéthyl)-N-alkyl-sulfosuccinamide, en particulier, ou un mélange contenant un tel composé, s'est avéré avantageux pour l'élimination de réactions non spécifiques lors de la détermination de lipase dans un échantillon biologique.

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