Department of Chemistry
and Biochemistry
The Michael Faraday
Laboratories, NIU
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.
- CD Basics Handout (PDF) by Norma J. Greenfield
- Operating Instructions (PDF)
Specifications:
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 24ºC +/- 2ºC.
Light Source: 150 Watt suprasil Xenon lamp controlled by a high stability, constant current, DC power supply.