The Department of Chemistry and Biochemistry
The Michael Faraday Laboratories
Northern Illinois University
DeKalb, IL 60115-2862
(815) 753-1131


Circular Dichroism

The Aviv Circular Dichroism Spectrometer, model 215, records CD as a function of wavelength, time, temperature, pH and concentration using a double monochromator containing two UV grade prisms as dispersing elements. Right and left circularly polarized light is produced by a 50 KHz photoelastic modulator.

The instrument includes software by AVIV for instrument control, data acquisition and processing in a Windows environment.

circular dichroism spectrometer


Wavelength Range: 200 to 1200 nm.

Stray Light: Less than 0.005% at 200 nm, less than 0.1% over operating limits.

Baseline Drift: Less than ±0.05 mdeg per hour after warm‐up, providing environment is held at 24±2°C.

Light Source: 150 Watt suprasil Xenon lamp controlled by a high stability, constant current, DC power supply.