What's all this?
This instructable will explain how to build a fairly basic but working spectrophotometer out of easily sourceable parts.Huh? What are you talking about?!
Of course, this device is nothing compared to a commercial spectrophotometer, but it will allow the builder to understand how such a device works.
measures the amount of light that a certain sample absorbs.
The basic principle
A beam of light passes through a prism or diffraction grating.
Out of the resulting spectrum, a certain (range of) wavelength(s) gets selected by sending the light through a slit.
The light passes through the sample and hits a detector.
This way, one can build a "spectrometric fingerprint
" of a certain sample that will depend on the molecules in the sample.Cool, let's do it!
I'd once again like to emphasize that this device is certainly not to be compared to a commercial system, but if you're looking for a fun project that will enable you to learn something more about the workings of a spectrophotometer, this project is for you!