In a bit of a pickle - wet recovery went wrong!

[SteveD]

Keep your Chemicals correct. Sulfamide is one thing and Sulfamic acid is a completely different Chemical.

Sulfamide (IUPAC name: sulfuric diamide) is an organosulfur compound with the chemical formula SO₂(NH₂)₂ and structure H₂N−S(=O)₂−NH₂.
Sulfamic acid, also known as amidosulfonic acid, amidosulfuric acid, aminosulfonic acid, sulphamic acid and sulfamidic acid. Formula: H₃NSO₃

Absolutely correct I’ll be more careful - sulfamic acid it was.

 

[Shark]

Also, when we run a dirty button and remove more contaminants the resulting cleaned button will weigh less. This is a good way to keep track of how much contaminants were in a given button.