A New Spectrophotometric Reagent for Fe(III): 2-(2,3-Dihydroxy-4-oxocyclobut-2-enylidene) Hydrozinecarbothiamide and Its Application in Real Samples

Figure 7

Determination of the stoichiometry of Fe(III)-ligand complex by the mole ratio method: C_Fe(III) = 10⁻⁴ M, C_𝐿 = (0.1 × 10⁻⁴–5 × 10⁻⁴) M; pH = 3; 𝐼 = 0.02.