title: The complexes of bismuth(III) and nitrilotriacetic acid.
abstract: The reaction between bismuth(III) and nitrilotriacetic acid (NTA or H(3)X) 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 x 10(3) and 8.20 x 10(3) l.mole(-1).cm(-1) respectively. The stability constants (at mu = 1.0) are: log beta(BiX) = 17.53 +/- 0.06 and log beta(B)(2)(3-) = 26.56 +/- 0.07. The possibility of the analytical application of BiX is briefly discussed.
authors.affiliation: Institute of Chemical Technology Sofia-56, Bulgaria.
authors.forename: B P
authors.initials: BP
authors.lastname: Karadakov
authors.forename: D I
authors.initials: DI
authors.lastname: Venkova