Abstract: A cuvet with an open upper portion adapted for connection to a source of variable pressure and a lower, sample retaining or window portion having a draw hole and transparent windows. A controlled source of variable pressure is provided with means for releasible connection to the open upper portion of the cuvet. After connection, the variable pressure source is actuated to reduce the pressure in the open upper portion of the cuvet to draw liquid sample through the draw hole and into alignment with the windows. The variable pressure source is also employed to transport and insert the cuvet into a cuvet holder of a spectrophotometer. The pressure is maintained in the cuvet to hold the liquid specimen aligned with the windows while the spectroanalysis is performed. Upon completion of analysis, means associated with the variable pressure source to heat and stir the sample while in the cuvet and to detach the cuvet are respectively provided.