Figure 7From: Quantifying hydrogen peroxide in iron-containing solutions using leuco crystal violet(Color) Photograph of the cuvettes containing pyrite slurry filtrate and LCV reagents. Both contain 1 mM EDTA. The left cuvette is purple due to CV+. On the right, catalase was added before addition of LCV. Catalase reacts rapidly with H2O2, preventing LCV oxidation and resulting in a colorless solution.Back to article page