@misc{oai:repo.qst.go.jp:00068158,
 author = {Kumar, Sahoo Sarat and Fujimoto, Kenzo and S., Zunic Zora and サフー サラタ クマール and 藤元 憲三},
 month = {May},
 note = {Actinides have widely entered the environment as a result of nuclear accidents and atmospheric weapon testing. These radionuclides, especially Uranium, are outstanding radioactive pollutants, due to their high radiotoxicity and long half-lives. In addition to this, since depleted uranium (DU) has been used in the Balkan conflict in 1999, there has been a concern about the possible consequences of its use for the people and for the environment of the region. Accurate, precise and simple determination methods are necessary in order to evaluate the human dose and the concentration and effects of these nuclides in the environment. Uranium has three stable isotopes of masses 234, 235 and 238 with average abundances of 0.0054%, 0.720% and 99.275%, respectively. The principal isotopes e.g. 235U and 238U are of primordial origin and 234U present in radioactive equilibrium with 238U. 236U occurs in nature at ultra trace concentrations with a 236U:238U atom ratio of 10-14.  Anthropogenic uranium also contains small amount of 236U, formed by neutron capture of 235U in nuclear industrial processes. Some 236U has only been found in geological samples specimens (e.g. samples from the Oklo reactor). 236U is a potentially “fingerprint” for the presence of uranium in the environment, originating from a nuclear reactor.
We have determined the concentration of uranium using inductively coupled plasma mass spectrometry (ICP-MS) in water, soil and hair samples collected in  villages e.g. Borovac, Reljan and Bratoselece in South Serbia where they received DU ammunitions. Soil and hair samples were digested using a microwave digester. Uranium was isolated from soil and hair samples by chemical separation procedure based on the use of anion exchange resin and UTEVA extraction chromatography column. The isotope ratios of uranium were measured using a VG (Micromass) thermal ionisation mass spectrometer in dynamic mode with Faraday cup and Daly ion counting system. Radioactive dis-equilibrium of 234U/238U and depletion of 235U/238U were noticed in some soil samples in addition to significant evidence of 236U/238U., International Congress of the International Radiation Protection Association},
 title = {Evidence of Depleted Uranium in South Serbian Environmental  Samples},
 year = {2004}
}