Cuvette with insert and adapter
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. Cuvette, comprising an insert ( 1 ) having at least one measuring area ( 4 , 5 , 83 , 84 ) on each one of two arms ( 7 , 8 , 67 , 68 ) 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 ( 4 , 5 , 83 , 84 ) have a distance for positioning a sample between the measuring areas ( 4 , 5 , 83 , 84 ), and an adapter for positioning the two arms ( 7 , 8 , 67 , 68 ) in a measuring position in a cuvette shaft of an optical measuring device with a sample between the two measuring areas ( 4 , 5 , 83 , 84 ) in a beam path of the optical measuring device that crosses the cuvette shaft, wherein the adapter has an internal cavity having two parallel guide rails for accepting the insert for positioning the two arms ( 7 , 87 , 67 , 68 ) and has a shape that is adapted to the cuvette shaft.
2. Cuvette according to claim 1 , wherein the adapter for positioning the two arms ( 7 , 8 , 67 , 68 ) is disposed in the measuring position in the standard cuvette shaft.
3. Cuvette according to claim 1 , wherein the adapter for positioning the two arms ( 7 , 8 , 67 , 68 ) is disposed in the measuring position in different positions in a cuvette shaft.
4. Cuvette according to claim 3 , wherein the adapter for positioning the two arms ( 7 , 8 , 67 , 68 ) is disposed in the measuring position in different height positions or different horizontal positions in a cuvette shaft.
5. Cuvette according to claim 1 , wherein the adapter has a cross section of the arms ( 7 , 8 , 67 , 68 ) swung together in the measuring position which is adapted to the cuvette shaft.
6. Cuvette according to claim 1 , wherein the two arms ( 7 , 8 , 67 , 68 ) are pivotally linked to each other via an articulation ( 69 ).
7. Cuvette according to claim 6 , wherein the articulation ( 69 ′) is a floating articulation.
8. Cuvette according to claim 1 , which has a limiter for preventing the swinging together of the arms in the measuring position, or which has a locking mechanism for detachably locking ( 85 to 88 , 89 to 92 ) the two arms ( 67 , 68 ) in the measuring position.
9. Cuvette according to claim 1 , which has the two measuring areas ( 83 , 84 ) on two insert parts ( 81 , 82 ) and which has means for detachably or not detachably holding the two insert parts on the arms ( 67 , 68 ).
10. Cuvette according to claim 1 , wherein at least one arm ( 67 ′) has a recess ( 125 ), extending from the outer side of the arm ( 67 ′) up to the measuring area ( 83 ′), for inserting a pipette point ( 127 ) and putting a sample between the measuring areas ( 83 ′, 84 ′) in the measuring position.
11. Cuvette according to claim 1 , wherein the insert ( 1 ) is a pincette having the two measuring areas ( 4 , 5 ) on the free ends of the arms ( 7 , 8 ).
12. Cuvette according to claim 1 , wherein the arms ( 7 , 8 ) of the insert ( 1 ) taper towards the free ends.
13. Cuvette according to claim 1 , wherein the insert ( 1 ) has a limiter for preventing the swinging together of the arms in a measuring position in which the two measuring areas ( 4 , 5 ) have a certain distance from each other, or a locking mechanism for detachably locking the two arms ( 7 , 8 ) in the measuring position.
14. Cuvette according to claim 1 , wherein the locking mechanism for detachably holding comprise an accommodation of the adapter ( 6 ) and a contour of the insert ( 1 ) whose geometries are matched such that the insert in insertable into the accommodation into at least one certain position.
15. Cuvette according to claim 14 , wherein the adapter ( 6 ′) and the insert ( 1 ′) have catching regions ( 129 , 130 ) for detachably holding the insert ( 1 ′) in different positions in the accommodation ( 131 ) of the adapter ( 6 ′).
16. Cuvette according to claim 14 , wherein the accommodation ( 131 ) is disposed asymmetrically with respect to the outline of the adapter ( 6 ′).
17. Cuvette according to claim 1 , wherein the two measuring areas ( 83 , 84 ) or insert parts ( 81 , 82 ) are optically transparent.
18. Cuvette according to claim 1 , wherein the two measuring areas ( 83 , 84 ) or insert parts ( 81 , 82 ) are platelet-shaped.
19. Cuvette according to claim 1 , wherein at least one measuring area ( 83 , 84 ) or at least one insert part ( 81 , 82 ) are made of plastics or quartz glass or glass and/or at least one arm or the insert or the adapter are made of plastics or metal.
20. Cuvette according to claim 1 , wherein at least one measuring area ( 83 , 84 ) has a planar pedestal.
21. Cuvette according to claim 1 , wherein at least one measuring area ( 83 , 84 ) has a deepening.
22. Cuvette according to claim 1 , wherein at least one measuring area ( 83 , 84 ) is hydrophobic.
23. Cuvette according to claim 22 , wherein at least one measuring area ( 83 , 84 ) has a less hydrophobic or hydrophilic spot.
24. Cuvette according to claim 1 , wherein at least one measuring area ( 83 , 84 ) is hydrophilic.
25. Cuvette according to claim 1 , wherein the measuring areas ( 83 , 84 ) are planar.
26. Cuvette according to claim 1 , wherein the measuring areas ( 83 , 84 ) are disposed in parallel in the measuring position.
27. Cuvette according to claim 1 , wherein the distance of the measuring areas ( 83 , 84 ) from each other is about 1 mm in the measuring position.
28. Cuvette according to claim 1 , wherein the distances between the two measuring areas ( 83 , 84 ) are dimensioned such that the volumes of the samples are 0.2 to 5 micro-liters.
29. Cuvette according to claim 1 , which has at least one stop for limiting a light beam through the measuring areas ( 83 , 84 ).
30. Adapter for at least one insert, said insert ( 1 ) having at least one measuring area on each of two arms ( 7 , 8 ) that are pivotally connected with each other, wherein the adapter has an internal cavity having two parallel guide rails for accepting the insert and is insertable into a cuvette shaft of an optical measuring device which has a locking mechanism for detachably holding the at least one insert ( 1 ), so that the arms ( 7 , 8 ) are swung together in a measuring position in which the measuring areas are in a distance from each other, and for positioning a sample between the measuring areas in a beam path of the optical measuring device that crosses the cuvette shaft.