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. 2020 Feb 10;6(2):e03358. doi: 10.1016/j.heliyon.2020.e03358

Figure 2.

Figure 2

Solubility chart of manganese gluconate as function of pH and gluconate concentration. Note: Filled markers mean precipitation occured while unfilled markers mean unprecipitated (no salt precipitation). The experiment was conducted at concentration of total manganese, total carbonate, and total sulfide in the solutions were 0.1 M, 0.3 M, and 10 mM respectively.