Analytical Services Unit

Analytical Services Unit
Analytical Services Unit

IR, UV/Vis and Other

Infra Red, Ultra Violet/Visible and Misc

We operate a DU series 520 spectro-photometer from Beckman for MDI (isocyanate), color and formaldehyde analysis. The instrument is also used for some graduate student projects.

Beckman DU520 UV/Vis Spectrophotometer
Beckman DU520 UV/Vis Spectrophotometer


We also have a ATI Mattson, Genesis Series FTIR Spectrometer. This spectrometer is primarily used to detect glycols in barrel samples (aqueous phase).

Genesis Series FTIR Spectrophotometer
Genesis Series FTIR Spectrophotometer


Other lab equipment such as a muffle furnace, centrifuges, platform shaker tables, end over end agitators (TCLP - toxicity characterization leachate procedure), rotary evaporators and Buchi Synchor concentrators are available and used as standard.

Synchor concentrator


IR Spectroscopy

"Fourier transform infrared (FTIR) spectroscopy is a measurement technique that allows one to record infrared spectra. Infrared light is guided through an interferometer and then through the sample (or vice versa). A moving mirror inside the apparatus alters the distribution of infrared light that passes through the interferometer. The signal directly recorded, called an "interferogram", represents light output as a function of mirror position. A data-processing technique called Fourier transform turns this raw data into the desired result (the sample's spectrum): Light output as a function of infrared wavelength (or equivalently, wavenumber".

See WIKIPEDIA, Infrared Spectroscopy

Typical IR spectrum from the DU520 spectral database
Typical IR spectrum from the DU520 spectral database

Specific functional groups give rise to specific stretch bands in an IR spectrum. Some of these groups are given in the table below:

Table of specific functional groups