Resolution: standard / high

Figure 4.

Characteristic colors of 10 mM water solutions of K2FeO4, KMnO4 and Fe2 (SO4)3. 1 = Permanganate; 2 = Potassium ferrate; 3 = Ferric chloride.

Crawford et al. BMC Microbiology 2003 3:4   doi:10.1186/1471-2180-3-4
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