The Thermo Scientific Evolution 220 UV-Visible spectrophotometer is a device designed to measure the absorption of electromagnetic radiation in the visible range as well as in near- and medium- ultraviolet. Spectrophotometric measurements are mainly used in quantitative analysis (determination of concentrations of various organic and inorganic substances), qualitative analysis, physicochemical tests (e.g. for kinetic studies), as well as for structural studies. The programmable temperature adapter with the Peltier cell being an additional equipment of the spectrometer extends its capabilities to perform measurements at precisely set temperatures in the range of 0-110oC The following table summarizes the basic properties of your spectrometer:

Baseline flatness ±0.0010A in 200-800 nm range, at 1.0nm bandpass, w. smoothing
Data interval 10, 5, 2, 1.0, 0.5, 0.2, 0.1nm
Detector type Dual silicon photodiodes
Absorbance drift <0.0005A/h at 500nm, 1.0nm bandpass, after 1h warm-up
Light source Xenon flash lamp
Photometric noise 0A: <0.00015A; 
1A: <0.00025A; 
2A: <0.00080A; 
RMS at 260nm, 1 nm
Optical design

Double beam with separate sample and reference cuvette positions

Czerny-Turner type monochromator, Application Focused Beam Geometry (AFBG)

Photometric accuracy 1A: ±0.006A
2A: ±0.010A
Measured at 440nm with neutral density filters, traceable to NIST
Displayed range -0.3 to 4.0A
Photometric range >3.5A
Photometric repeatability ±0.0002A
Measurement modes Absorbance, % Transmitance, % Reflectance, Kubelka-Munk, log (1/R), log (Abs), Abs*Factor, Intensity
Scan speed Variable, <1-6000 nm/min
Spectral bandwidth Variable: 1.0nm; 2.0nm; Application-Focused: microcuvette; optic-fibre; materials-optimized
Wavelength accuracy ±0.5nm (for 541.9 and 546.1nm mercury lines), ±0.8nm (in full working range - 190 to 1100nm)
Wavelength range 190 – 1100nm
Wavelength repeatability ≤0.05nm (mercury line, 546.11nm, SD from 10 measurements)