An inductively coupled mass spectrometric method was developed for the direct determination of iodine in urine. The application of isotope dilution analysis with added 129I offers new possibilities for automatic and accurate determinations. The sample preparation consists of dilution with an ammonia solution containing 129I. The validation was made by comparison with the results obtained in ano...

AIMS To evaluate the iodine status of patients in early pregnancy and its dependence on level of thyroid-stimulating hormone (TSH). METHODS Between June 2005 and December 2006, 168 patients with a confirmed vital pregnancy (up to 10(th) week of pregnancy) were included in the study. The entry criteria were no prior thyroid disease, did not take any other medication, had not undergone radio-io...

Concentrations and species of iodine isotopes ((127)I and (129)I) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic (129)I in the Arctic Ocean and the Nordic Seas, concentrations of the isotope in the Atlantic Ocean are, however, still unknown. We here present first data on (129)I ...

The physico-chemical form in which the secretion of the thyroid gland exists in blood is not well understood. It is generally believed to be associated in some manner with the plasma proteins since the iodine content of precipitated washed plasma protein (1) and the rate of turnover of 131 in this protein appears to vary with the state of thyroid activity (2). The observation of Trevorrow (3) t...

Using xenon as a fill gas in IFE chambers results in generating a large amount of radioactive xenon, iodine, and cesium isotopes. The cesium isotopes, Cs and Cs, and the iodine isotope, I, would produce a high level of off-site dose (62.13 rem) at the plant site boundary if they were released entirely to the environment during an accident. The xenon gas is pumped out of the chamber (recycled) d...

We report a patient with pulmonary and bony metastases due to follicular carcinoma of the thyroid, occurring 12 years after the initial diagnosis. This was brought to light by worsening diabetic control due to thyrotoxicosis from functioning malignant thyroid tissue. Following radio-active iodine therapy, she remains well with good control of her diabetes.

When the former method is employed for production, enriched uranium irradiated for 2-3 weeks in the nuclear reactor is dissoivoc! in nitric acid and the iodine-131 is distilled and collected. '*) But separation of iodine-1 31 from pile irradiated tellurium targets is the most commonly used method of production. The methods <d Reparation varies for different targets. With metal tellurium the tar...