Source: Le Radium, February 1904.

From Trafficking materials and gendered experimental practices: Radium research in early 20th century Vienna by Maria Rentetzi

  • European: 1800-present
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  • The precipitation of metals. The ore was fused with sodium carbonate and then dissolved in hydrochloric acid. The metals of the lead group were removed by precipitation with hydrogen sulfide and the remaining metals such as iron and zinc were also removed by precipitation with suitable agents. Source: Le Radium, February 1904.