Vortex-assisted liquid-liquid microextraction procedure for iodine speciation in water samples

A novel, sensitive and selective method for the spectrophotometric determination of the basic inorganic iodine species was developed based on the vortex-assisted liquid–liquid microextraction (VALLME) of an ion pair formed between colorless tetrabutylammonium cation (TBA) and triiodide anion (I3−). Molecular iodine was determined spectrophotometrically at 295 nm by the measurement of the intrinsic triiodide absorbance after the addition of an...