Ammonium Persulfate

[rickzeien]

Interesting paper on researchgate....

https://www.researchgate.net/profile/Maria_Lopez90/publication/293330298_Recovery_of_gold_from_waste_electrical_and_electronic_equipment_WEEE_using_ammonium_persulfate/links/5bc37a82a6fdcc2c91fbe8b6/Recovery-of-gold-from-waste-electrical-and-electronic-equipment-WEEE-using-ammonium-persulfate.pdf

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[Williamjf77]

Isn’t ammonium per sulfate the blue pcb etchant used instead of ferric chloride or copper chloride