Device and method for examining samples in a liquid

A method for examining samples in a liquid, comprising the following steps:

• a) fixing the sample to the upper side of a movable shaft, wherein the shaft is surrounded by a bath,
• b) positioning the sample in a cuvette that is open to the top or lowering a cuvette that is at least open toward the bottom over the shaft in the direction of the base of the bath, wherein a gap remains between the bath base and cuvette,
• c) filling the bath with the liquid,
• d) generating a pressure difference between the interior of the cuvette and the region outside of the cuvette, wherein the fill level of the liquid in the cuvette is set by setting the pressure difference,
• e) carrying out the examination on the sample, wherein a relative movement between sample and cuvette is possible.

A method for examining samples in a liquid, comprising the following steps:

• a) fixing the sample to the upper side of a movable shaft, wherein the shaft is surrounded by a bath,
• b) lowering a cuvette that is at least open toward the bottom over the shaft in the direction of the base of the bath, wherein a gap remains between the bath base and cuvette,
• c) filling the bath with a first liquid which has a first density,
• d) filling the bath with a second liquid with a second density, wherein the second density is less than the first density such that the weight of the second liquid with the second density acts on the first liquid and presses the latter into the cuvette,
• e) carrying out the examination of the sample, wherein a relative movement between sample and cuvette is possible.