Gold recovery from mixed pins.

[@redbaronrefining5322]

Should have rinsed the precipitate with hot HCL. That was a lot of copper sulphate in your second refine.

[@toseefabid9129]

sodium metabisulphite is written on the box

[@blukhusoh9206]

You're so brilliant 🔥🔥

[@nagaewaste]

Thank you 😊

[@kabyleking4757]

Hy Can you tell me what is the difrance SMB laboratory grade and SMB industriel grade

[@gilbertogrimm5843]

Metabisulfito Grado Alimenticio.