Simple electrochemical cell and microcell for spectrofluorimeters

A microcell and an electrochemical cell for fluorescence studies are described. The cells are inexpensive and can be constructed in a few minutes without special equipment. They can be used in commercial instruments without special cell adapters and without the need of alignment. Tests show that high-resolution spectra can be recorded with the cells and that picogram amounts of material can be determined. The major advantage of both cells is the small sample volume required. The sample volume has been reduced to 2 µl for the microcell and 90 µl for the electrochemical cell. Simplicity of construction, accuracy and small sample volume make these cells suitable for many applications.