Cuvette

Abstract

Cuvette, comprising at least one measuring area on each one of two arms that are pivotally connected to each other such that from a swung-apart condition, they can be swung together into a measuring position in which the two measuring areas have a distance for positioning a sample between the measuring areas, and means for positioning the two arms in a measuring position in a cuvette shaft of an optical measuring device with a sample between the two measuring areas in a beam path of the optical measuring device that crosses the cuvette shaft.

1 . A cuvette, comprising insert parts with two measuring areas and an adapter for insertion into a cuvette shaft of an optical measuring device, wherein the insert parts have two measuring areas, and means for detachably holding the insert parts on the adapter, the measuring areas being in a distance from each other, for positioning a sample between the measuring areas in a beam path of the optical measuring device that crosses the cuvette shaft, and wherein the insert parts and adapter are fixedly connected to each other. 
     
     
         2 . A cuvette according to  claim 1 , wherein the adapter has a shape matched to the cuvette shaft. 
     
     
         3 . A cuvette according to  claim 1 , wherein the cross section of the cuvette is matched to the cross section of a standard cuvette shaft. 
     
     
         4 . The cuvette according to  claim 3 , wherein the cross section of the cuvette is matched to the cross section of a standard cuvette shaft, which has a square cross section with a bottom area of 12.5×12.5 mm. 
     
     
         5 . A cuvette according to  claim 1 , wherein the insert and/or the adapter is made of metal and/or of one or plural plastics. 
     
     
         6 . A cuvette according to  claim 1 , wherein the measuring areas or insert parts are made of transparent plastics, quartz glass or another optically transparent glass. 
     
     
         7 . A cuvette according to  claim 1 , wherein the distances between the two measuring areas are dimensioned such that samples with volumes in the range of 0.2 to 5 microliters, can be held there between. 
     
     
         8 . A cuvette according to  claim 1 , wherein the measuring areas are present on said insert parts made of quartz glass or plastics that are replaceably or not detachably connected to said adapter. 
     
     
         9 . A cuvette according to  claim 1 , which has means for detachably locking said adapter in the measuring position. 
     
     
         10 . The cuvette according to  claim 1 , wherein the adapter is made of metal and comprise incorporated magnets for locking the adapter in the measuring position, or wherein said adapter is made of plastics and comprise elastic catching hooks that co-operate with catching edges for locking the adapter in the measuring position. 
     
     
         11 . A cuvette according to  claim 1 , wherein the at least one insert part is a platelet. 
     
     
         12 . A cuvette according to  claim 1 , wherein the measuring areas are present on plane-parallel platelets in an arrangement so as to cover up each other. 
     
     
         13 . A cuvette according to  claim 1 , wherein the distance of the measuring areas from each other is 5 mm or less in the measuring position. 
     
     
         14 . A cuvette according to  claim 1 , wherein the optically transparent measuring areas are realized so as to have a central liquid-wetting surface portion in their center, around which there is a liquid-repellent surface portion. 
     
     
         15 . The cuvette according to  claim 14 , wherein a light-permeable surface portion corresponds to the liquid-wetting surface portion, and a light-impermeable surface portion on the outer side of the insert part corresponds to the liquid-repellent surface portion. 
     
     
         16 . A cuvette according to  claim 1 , wherein deepenings are arranged in the measuring areas. 
     
     
         17 . A cuvette according to  claim 1 , wherein a planar pedestal is arranged on each measuring area. 
     
     
         18 . A cuvette according to  claim 1 , wherein the thickness of a layer between the two measuring areas is defined by a spacer ring. 
     
     
         19 . The cuvette according to  claim 18 , wherein spacer rings are assigned to both measuring areas, which come into contact with each other when the device is closed. 
     
     
         20 . A cuvette according to  claim 1 , wherein the layer thickness is ensured by magnetic forces from magnets, whose unlike poles are arranged in a short distance from each other when the device is closed.