Heatsinks

[g_axelsson]

Two ways of testing for indium is using spectroscopic methods and voltammetry. Both are a bit tricky but should be possible for a crafty amateur. As I'm working a lot with electronics I have looked into voltammetry as an interesting way of analyzing liquids.
https://en.wikipedia.org/wiki/Voltammetry

Göran

 

[g_axelsson]

Adding to the indium recovery... interesting article from 1944 about indium and extraction.

Written at a time when the total accumulated indium production was... 1 pound. :mrgreen:

Göran

 

[solar_plasma]

Excellent!