Applied Photophysics qCD spectrometer

The qCD (quantitative CD) spectrometer from Applied Photophysics is said to extend the capabilities of CD spectrometry. The product reflects a number of novel capabilities that improve performance and enable absolute CD measurement.

Absolute CD calibration is achieved using a multipoint optical standard, with absolute CD accuracy to within 1%. Precision error bars are available with each CD measurement.

The product has sensitivity equivalent to a synchrotron-CD in the 170–260 nm region. This is claimed to be higher sensitivity than all other CD spectrometers.

Thermal ramping modes mean that structural, stability and aggregation information can be obtained in one 75 min experiment. There is a low nitrogen purge requirement of just 5 L/min at 170 nm, compared to 20 L/min on other CD instruments.

The spectrometer features preset/auto start-up and switch-off of N2 purge and lamp ignition. This means the instrument can be ready for use when users reach the lab and can be left on to complete an experiment when they leave.