What is the difference of filter photometer and uv-vis spectrophotometer in terms of absorbance reading factor?

Question

Harper Clark · Accepted Answer

There is none. Absorbance is the same relative value at a given wavelength for either type of instrument.

A UV-Vis Spectrophotometer may use filters or a variable scanning sensor; in all cases, spectrometry readings of absorbance units go from 0 to 1 based on a relative absorbance by a standard filter at a given wavelength. A filter photometer is a colorimeter in which the length of light is selected by the use of appropriate glass filters. Consequently, the "absorbance reading" remains constant irrespective of the particular mechanism of the instrument. The Beer-Lambert Law utilized in the computation can be viewed at https://tutor.hix.ai

Alice Andrews · Answer

undefined While a filter photometer isolates light wavelengths using specific filters, a UV-Vis spectrophotometer uses a monochromator to select individual wavelengths; as a result, UV-Vis spectrophotometers have higher precision and flexibility in wavelength selection than filter photometers, and they are able to measure absorbance over a wider range of wavelengths than filter photometers. This is the main difference between a filter photometer and a UV-Vis spectrophotometer in terms of absorbance reading factor.