“…Elementary iodine is liberated employing a redox reaction with Na 2 SO 3 and NaNO 2 in dilute H 2 SO 4 or HNO 3 . The RNAA procedures developed were employed for the determination of iodine in daily diet samples in Slovenia (Pokorn et al, 1999), Poland (Kunachowicz et al, 2000), in cereal grains in Austria (Shinonaga et al, 2000), in fish samples in Libya (Arafa et al, 2000), in Asian diet samples (Kucˇera et al, 2004;Akhter et al, 2004), and in Polish infant formulae (Osterc et al, 2006), just to give a few recent examples. The chemical yield of separation, mostly in the range of 85-95%, is determined spectrophotometrically or with the aid of the 131 I radiotracer added prior to sample decomposition.…”