“…These include methods based on catalytic reactions [6,7], gas chromatography of iodine in the form of iodoacetone and iodobutanone [8], X-ray fluorescence spectrometry [4,9], the use of iodide-ion-selective electrodes [10,11] and most lately inductively coupled plasma mass spectrometry, especially with the isotope dilution method [12,13]. Two very sensitive methods for determination of traces of iodine, with the advantage of freedom from reagent blanks, are thermal neutron activation in either its destructive or radiochemical form [14,15], and epithermal neutron activation analysis for non-destructive determination of this element when its concentration is somewhat higher [16,17]. A rapid radiochemical activation analysis of different food articles and diets was previously developed and optimised for the determination of low concentration of iodine [18,19].…”