UV/Vis Spectrophotometer

Location: NMR Lab
Responsible: Pedro Marques de Almeida
The UV/Vis Spectrophotometer PG instruments T90+ is a high performance double beam scanning spectrophotometer with a variable (0.1, 0.2, 0.5, 1.0, 2.0, 5.0nm) spectral bandwidth. The double beam optical design combined with a high specification holographic grating gives excellent wavelength separation allowing the user to measure close adjacent wavelengths with excellent sensitivity. Its modular design of the sample compartment allows for ease of use of a wide range of optional accessories ensuring accurate analysis of various sample types including liquids, thin films and powders. The T90+ spectrophotometer has full connectivity to the UV-Win software for instrument control, data acquisition and interpretation of measurement results.


Optical System Double beam
Scan Speed Selectable
Wavelength Range 190 - 900nm
Wavelength Accuracy ± 0.3nm
Wavelength Reproducibility ≤ 0.1nm
Spectral Bandwidth 0.1, 0.2, 0.5, 1.0, 2.0, 5.0nm
Photometric Mode Transmittance, Absorbance, Energy Concentration, All Using UVWin Software
Photometric Range -4.0 - 4.0Abs
Photometric Accuracy 0.002A (0 - 0.5A), 0.004A (0.5 - 1.0A), 0.3%T (0 - 100%T)
Photometric Reproducibility 0.001A (0 - 0.5A)
Photometric Noise 0.0004A (500nm) 30min warm-up
Baseline Flatness 0.001A (200 - 850nm)
Baseline Stability 0.0008A/h (500nm, 0Abs), 2hr warm-up
Stray light ≤ 0.01%T (220nm Nal, 340nm NaNO2)
Cell Holder Fixed position sample and reference
Detector Photo multiplier tube
Light Source Tungsten Halogen and Deuterium arc lamps
PC Interface RS232
Software Support UV Win