Iodine speciation: a potential indicator to evaluate new production versus regenerated production

Researchers at the DYFAMED permanent station in the northwestern Mediterranean Sea determined monthly vertical profiles of iodide, iodate and total free iodine in the area for a period of one year. Differential pulse polarography and cathodic stripping square wave voltammetry were used to determine dissolved iodate and iodide, respectively. The predominant species present was iodate while iodide was concentrated in surface waters. Total free iodine was slightly lower in surface waters than in deep waters.