Analysis of marine samples by neutron-induced prompt gamma-ray technique and ICP-MS

Multi-element and isotopic analyses of oils and marine environmental sample s were carried out to estimate a contamination source using a "finger print ing" method. Elemental analyses were carried out using neutron-induced prom pt gamma-ray analysis (PGA), instrumental neutron activation analysis (INAA ) at the Japan Atomic Energy Research Institute, Tokai-mura, Japan (JAERI) and ICP-MS in the IAEA Marine Environment Laboratory, Monaco (MEL). Fifteen elements including light elements, H, B, N, Si and Ca, which cannot be det ermined by INAA and ICP-MS, were determined by PGA. A total of 47 elements were determined in the present study. The potential of PGA for the determin ation of isotopic ratios was tested by measuring S-34/S-32 ratios in oils. The evaluation of historical records of marine environmental conditions usi ng annual bands in coral samples was also investigated.