Patent ID: 7981689

Claim:
Absorption spectrometric analysis microchip, comprising a microchip body in which is formed: a chamber for holding a sample, a chamber for holding a reagent which reacts with the sample, a mixing chamber for mixing the reagent with the sample to form a mixture, and a sensing part having a mixture receiving sensing chamber for holding the mixture, the sensing part having a light incidence surface for the entry of light into the sensing chamber on first face thereof and a light exit surface for emergence of light from the mixture receiving sensing chamber on an opposite second face thereof, wherein the sensing part with the sensing chamber is located in a protrusion of the microchip body, wherein the light incidence surface is located in a first recess area of the sensing part and light exit surface is located in a second recess area of the sensing part, and wherein the sensing part has a longitudinal axis that is essentially aligned with the optical axis of the light that is directed through the sensing chamber during at least one of an absorption and a scattering of the light measurement, the first and second recesses being located opposite one another in the direction of said optical axis, wherein the light incidence surface is formed by a portion of the microchip body itself and is located in a first recessed area of the sensing part and the light exit surface is formed by a portion of the microchip body itself and is located in a second recessed area of the sensing part such that damage to the light incidence and exit surfaces and adherence of impurities to the light incidence and exit surfaces is prevented.