Diethylenetriamine pentaacetate; chelators. Chelators are organic compounds capable of integrating metal ions in the organic moleculeAn atomic group held together by chemical forces. The atoms ... in such a way that the metal ionElectrically charged atomic or molecular particle which can ... loses its chemical properties essential for its biological behaviour and can therefore be excreted more rapidly from the body. Thus, effective decorporation agents in the form of Ca-DTPA and Zn-DTPA – in particular for plutoniumPlutonium - the 94th element in the classification of elemen... – are available.