Wednesday, September 11, 2019

What is the difference between colorimeter and spectrophotometer?

In chemistry, the colorimetry and spectrophotometry both techniques are used to determine the absorption and transmittance properties of molecules. Besides, it is a simple method to identify the concentration of a sample solution. The colorimeter and spectrophotometer both are working on the same principle i.e. Beer-Lambert Law.
The colorimeter is tools that perform "tristimulus" color measurements on the base of light passing through three primary filters. The color measurement gives information about how much amount of light absorbs or transmitted by an analyte. 
Ultraviolet-visible spectrophotometer refers to absorption spectroscopy in the region of ultraviolet-visible. A UV/VIS spectrophotometer has high accuracy and increased versatility. It is appropriate for more complex color analysis since it can measure the spectral reflectance at every wavelength. Though, the spectrometry can be more costly as compared to colorimeter
The main difference between a spectrometer and a spectrophotometer is that the spectrometer operates at fixed wavelengths in the visible range, while the UV/Vis spectrophotometer works on a wide range of wavelengths. 

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