The Perkin Elmer Lambda 40 UV spectrometer is a double beam device with a wavelength of 190-1100 nm. The accuracy of the wavelength is +/- 0.1 nm and the resolution is 0.5 nm. It has different slit widths: 0.5 ; 1.0; 2.0 and 4.0 nm. The device has a digital display, a touchscreen and can be operated as a standalone system. There is a holder for cuvettes with a size of 10 mm; Cuvettes with 100 mm can also be used on request. The associated software is Perkin Elmer UV-Winlab Labprocure is responsible for this device.