Ultraviolet-Visible Spectroscopy (UV-Vis)

Instrumentation

Click on the instruments below to learn more about each one.

Perkin-Elmer Lambda 950 UV-Vis-NIR Spectrophotometer (MRI Building)
Varian/Cary 100 UV-Vis Spectrometer (175 MRL)

Description

Measurements in the ultraviolet/visible region cover wavelengths from about 200 nm to 800 nm. The absorption of ultraviolet or visible radiation by a molecule leads to transitions among the electronic energy levels of the molecule. The strength of UV/visible spectroscopy lies in its ability to measure the extent of multiple bond or aromatic conjugation within molecules. It is ideal for characterizing the optical and electronic properties of many different materials such as films, filters, and pigments. In general, it is a non-destructive technique and the data collection is quite rapid in comparison to other characterization methods. Reasonable spectra can be collected in just a few minutes.

Rates

Click here to view current pricing rates

Basic Theory

See the theory page for a brief introduction to the underlying principles of UV-Vis spectroscopy.

Sample Requirements

Samples may be in liquid or solid form.
Sample requirements vary according to the technique chosen for analysis. See the MCL staff for additional information or to discuss your samples.