DIY mass spectrometer measures potassium in dietary salt substitute
Applied Science · 3 HN recommendations
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Ben Krasnow of Applied Science builds and operates a simple mass spectrometer, using it to measure potassium isotopes in a salt substitute. He explains the design choices and the theory behind it.
Why HN recommends it: Recommended as an expert-made DIY build that explains why the apparatus is designed as it is, though one commenter notes a missing baseline run.
“he tries to explain why it's built the way it is and give you a good basis of the theory of operation.” Read on HN ↗