Applied Photophysics Circular Dichroism Spectrometer

Specifications:

Light source 150W Xe arc, air-cooled 
                        150W Hg-Xe arc, air-cooled (optional)

Monochromator F/7 double prism, both dispersive, both polarising

Wavelength accuracy ±0.2 nm (170nm - 400nm), ±0.5 nm (400nm - 900nm)

Wavelength precision  ±0.05 nm (170 - 400 nm), ±0.1 nm (400 - 800 nm)

Wavelength resolution  0.1nm throughout range

Bandwidth 0 to 2nm at 160nm, 0 to 4nm at 180nm, 0 to >10nm at >250nm

Wavelength range 165nm - 1360nm

Stray light  <5ppm at 200nm, <8ppm at 180nm

Baseline stability  ±0.02 m o /hr

Scanning modes  Discrete sampling step-scan, Adaptive sampling step-scan

Scanning speeds  Dependent upon step-scan resolution approximately 500nm min-1 at 0.5nm step

Kinetic modes  Linear timebase, Split-linear timebases, Logarithmic timebase

Response time  Not applicable. Chirascan uses the superior method of digital oversampling which eliminates the risk of damage to data.

CD full scale  ±1500 m

CD resolution  64 bit

RMS noise  0.015m ° at 185nm, 0.012m ° at 200nm, 0.015m ° at 500nm, (1nm bandwidth, 16s oversampling (integration))

0.007m ° at 185nm, 0.007m ° at 200nm, 0.008m ° at 500nm, (2nm bandwidth, 16s oversampling (integration))

Data channels  Internal: 2 standard; up to 16 optional.

External (standard): 6 inputs for temperature (multiplexed); 3 analogue inputs; plenty of digital I/O