Aviv Circular Dichroism Spectrometer, model 400, 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, processing and publication quality presentations in a Windows environment. All experiment parameters are accessed through pull down menus. Control panels allow easy entry of all data acquisition parameters.
An extensive list of experiment modes are available. New experiment modes include Wavelength and Temperature Schedules. These modes allow the user to create arbitrary lists of wavelengths or temperatures for measurements. These modes allow key elements to be monitored without the time of performing entire scans.

SPECIFICATIONS

Wavelength Range:
Range: 165 nm to 900 nm. Optional to 1200 nm
Stray Light: Less than 0.005% at 200 nm, less than 0.1% over
operating limits.
Slit Program: Constant bandwidth from 0.01 to 12 nm. Automatic
slit closure option to protect sample and optics from UV light.
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.
RMS Noise
Less than:
0.1 mdeg at 185 nm
0.08 mdeg at 200 nm
0.06 mdeg at 500 nm

Note: All specifications subject to change without notice.