Abstract
The reaction between bismuth(III) and nitrilotriacetic acid (NTA or H 3X) has been investigated by ultraviolet spectrophotometry. It has been established that bismuth(III) and NTA form two complexes with compositions bismuth(III): NTA = 1:1 and 1:2. The absorption maxima are at 243 nm (1:1) and 271 nm (1:2), the molar absorptivities being 8.00 × 10 3 and 8.20 × 10 3 l.mole −1.cm −1 respectively. The stability constants (at μ = 1.0) are: log β BiX = 17.53 ± 0.06 and log β B 2 3− = 26.56 ± 0.07. The possibility of the analytical application of BiX is briefly discussed.
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