| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4429352 | Science of The Total Environment | 2012 | 6 Pages |
129I and 127I concentrations in animal thyroids coming from several regions of Argentina were determined by accelerator mass spectrometry (AMS) and gas chromatography (GC), respectively. The measured 129I/127I ratios, ranging from 3 × 10− 12 to 4 × 10− 10, are significantly lower than those typical for areas in the northern hemisphere (10− 10–10− 7). The 129I concentrations show a clear dependence with latitude and season, which can be understood considering tropospheric circulation patterns, possible 129I sources and regional precipitation rates.
► This is the first determination of 129I in thyroids from the southern hemisphere via AMS. ► Isotopic ratios measured are lower than those found in areas of the northern hemisphere. ► Two samples represent 129I/127I ratios similar to pre-anthropogenic values. ► Our data show a clear dependence with latitude and season, related with deposition pathways. ► We find a strong decorrelation between 129I and iodine sources.
