Figure 5

Determination of the TTC:vanadium molar ratios by the mobile equilibrium method; m=1. pH 5.5, cV(IV) = cV(V) = 3×10−5 mol dm−3, cND = 4.0×10−4 mol dm−3, λ = 333 nm (1 and 2) or 630 nm (1′ and 2′). 1 and 1′ obtained with VIV, and 2 and 2′ – with VV. Straight line equations: 1) y = 1.22x + 4.87; 1′) y = 1.02x + 4.19; 2) y = 1.02x + 5.15; and 2′) y = 1.02x + 5.39

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