Comparison of Scanning and Array UV/VIS Spectrophotometers

UV/Vis spectrophotometers are classified into two categories according to the geometry of the components that build up the optical system; scanning instruments, usually equipped with a tungsten-deuterium lamp combination, and array spectrophotometers, which typically use a xenon lamp. Careful consideration of the features and benefits of both systems will enable users to make the correct choice for their laboratory.

The performance aspects of a UV/VIS spectrophotometer – such as optical and wavelength resolution, measurement speed, bench space requirements and cost of ownership – depend directly on the design of the instrument. Most of the currently available UV/VIS spectrophotometers are equipped with a tungsten-deuterium lamp combination as the light source, but there are advantages to using a system that combines array technology with a xenon light source, including:

·         Extended instrument lifetime

·         Faster measurements due to the lack of moving parts

·         Smaller footprint

·         More robust set-up and reduced downtime

·         Fewer lamp replacements

·         Minimal maintenance costs

This white paper explains the differences between these set-ups, including the type of lamp and internal optical configuration, and how the design contributes to performance characteristics and the efficiency of your lab.