gdnaiudu
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e waste precious metal refining
Dear sir . Fine metal refining by aquaregia process the photo attachment color received give a suggestion for pricipitating gold
![PHOTO_20190802_200411.jpg - 505kB](https://www.sciencemadness.org/whisper/files.php?pid=619490&aid=76546)
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TmNhRhMgBrSe
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Sodium metabisulphite.
Go youtube, search sreetips, watch his vids. He has a bunch of gold refining vids.
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gdnaiudu
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DEar all, after filtration of brow precipitate washing with hot water as shown attachment out put ur suggestion could help me come to an
conclusion of refining it
Attachment: drive-download-20190803T065200Z-001.zip (1.1MB) This file has been downloaded 296 times
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