Patent ID: 7780828

Claim:
An analytical instrument having improved arrangement of reagent portion, the analytical instrument comprising: a flow path for moving a sample containing blood cells; an introduction port for introducing the sample into the flow path; an electron detection medium for obtaining information necessary for analyzing an analysis target component contained in the sample in relation with an amount of electrons transferred; a reagent portion arranged directly in the flow path, the reagent portion containing an electron mediator for supplying an electron taken from the analysis target component in the sample to the electron detection medium, at least part of the reagent portion being positioned adjacent to the introduction port; and an additional reagent portion provided separately from said reagent portion and containing an oxidoreductase for taking an electron from the analysis target component contained in the sample and supplying the electron to the electron mediator; wherein said reagent portion, the additional reagent portion, and the electron detection medium are provided on a same plane, and the reagent portion is arranged upstream from the electron detection medium in a direction of flow of the sample while being separated from the electron detection medium.