Test apparatus for assaying a component in a liquid sample

Abstract

A test apparatus for assaying a component in a liquid sample by measuring a reflected light comprising a support having a through hole or a light permeable area, a reagent layer having a detecting area fixed on the support to cover said through hole or light permeable area, and a cover which covers at least the detecting area, wherein at least a portion covering the detecting area in the cover is processed into a color which substantially has no influence on the reflected light at a measured wavelength.

What is claimed is:  
     
         1 . A test apparatus for assaying a component in a liquid sample by measuring a reflected light comprising 
 a support having a through hole or a light permeable area,    a reagent layer having a detecting area fixed on the support to cover the through hole or light permeable area, and    a cover which covers at least the detecting area,    wherein at least a portion covering the detecting area in said cover is processed into a color which substantially has no influence on the reflected light at a measured wavelength.    
     
     
         2 . The test apparatus as claimed in  claim 1 , wherein said color is black.  
     
     
         3 . The test apparatus as claimed in  claim 1 , wherein said color is transparent.  
     
     
         4 . The test apparatus as claimed in  claim 1 , wherein said color has a reflectance of less than 30%.  
     
     
         5 . The test apparatus as claimed in  claim 1 , wherein said cover is fixed on the support in such a manner that a sample-holding room is formed between the cover and the reagent layer, and said cover has a sample-supplying hole and an air exhaust hole.  
     
     
         6 . The test apparatus as claimed in  claim 1 , wherein said cover is contacted with one side of the reagent layer opposite to the support.  
     
     
         7 . The test apparatus as claimed in  claim 1 , wherein a light reflection layer is further provided on the reagent layer in contact with the reagent layer.  
     
     
         8 . The test apparatus as claimed in  claim 1 , wherein said reagent layer contains light reflective particles.  
     
     
         9 . The test apparatus as claimed in  claim 1 , wherein the liquid sample is whole blood.  
     
     
         10 . The test apparatus as claimed in  claim 1 , wherein a porous membrane is further provided between the reagent layer and the support.