PIPETTE TOOL CONTAINING A REACTIVE SYSTEM, PROCESS FOR THE PREPARATION AND USE PARTICULARLY IN THE FIELD OF UNITARY DOSINGS BY COLORIMETRY OR PHOTOMETRY

摘要

The present invention relates to a device for laboratory reaction and especially for colorimetric or photometric assay, said device, which is of the pipette tip type containing a reagent system, being characterized in that it comprises: (a) a nozzle of pipette of non-hydrophobic material and preferably transparent, and (b) a reagent system comprising at least one reactant intervening according to a reaction process which is appropriate to it, said reactive system, which (i) is solid or gelled, and which (ii) is soluble or dispersible in a reaction medium intended to be sucked at the moment of use, being temporarily immobilized, vis-à-vis the inner wall of said tip until the moment of use, in a form selected from set consisting of: (1) pulverulent, said dried reactive system being adsorbed on a portion of the inner wall of the mouthpiece, and (2) gelled, said reagent system being distributed in the It also relates to the method of preparation of this device and its use in the field of colorimetric or photometric assays.