SORPTION-SPECTROSCOPIC DETERMINATION OF TITANIUM (IV) IONS USING CONGO RED REAGENT IMMOBILIZED ON SILK FIBROIN FIBER
The sorption-spectroscopic determination of titanium (IV) ions using Congo red reagent immobilized on silk fibroin fiber was
investigated. It was established that optimal complexation occurs in an acetate buffer solution at pH=4.6. The maximum light
absorption of the complex was recorded at λ=575 nm. A linear dependence of optical density on Ti(IV) concentration is observed
in the range of 0.9–1.3 μg/L. The presence of a Ti-O bond in the complex structure was confirmed by IR spectroscopy in the 600–
500 cm⁻¹ region. The developed technique ensures high accuracy and rapidity in the analysis of trace amounts of titanium.
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