Question: How can we detect contaminants in water samples with a DIY spectrometer using reagents?

warren is asking a question about spectrometry: Subscribe to answer questions on this topic

warren asked on December 18, 2017 12:28
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I've seen some good work on the site with #reagents, which change color or opacity of a liquid sample when a specific compound or chemical is present. Since lots of people are interested in using spectrometers to do this; what kind of experiment design would enable people to do reagent-based analysis with a DIY spectrometer like one of these?



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What contaminants exactly you are talking about? There is photometer reagents for many different chemicals. For example this shop has many different kinds you can look at. https://www.camlab.co.uk/spectrophotometer-and-colorimeter-reagents-c2662.aspx In description there reads method that that reagent uses. Just google method and you will find articles about it.

I am going to test hydroponics water with reagents like these and spectrometer for nutrient level analysis when I have build my Lego spectrometer. I will share my experience later.

Here is example of using commercial colorimeter to measure aluminum concentration in water. https://riversource.net/wp-content/uploads/2013/01/hach-dr-890-colorimeter-procedures-4-methods.pdf

I hope this is helpful.


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