Authors:John Bennett, Peter Grave, and Attila Stopic
The k0-method of standardisation for instrumental neutron activation analysis (INAA) has been used at the OPAL research reactor
to determine the elemental composition of three certified reference materials: coal fly ash (SRM 1633b), brick clay (SRM 679)
and Montana soil (SRM 2711). Of the 41 certified elements in the three materials, 88 percent were within five percent of the
certified values and all determinations were within 15 percent of the certified values. The average difference between the
measured and certified values was 0.1 percent, with a standard deviation of 4.1 percent. Since these reference materials are
widely used as standards in the analysis of archaeological ceramics by INAA, it has been concluded that the INAA facility
in Australia is particularly well-suited for nuclear archaeometry.
Authors:L. Sneyers, L. Verheyen, P. Vermaercke, and M. Bruggeman
A recent study on trace elements in beauty products and cosmetics sold on the Asian market has shown the presence of high
levels of U, Th and rare earth elements in so called “Hormesis cosmetics.” For the purpose of comparison, some more information
about trace elements in European cosmetics would be useful. In this paper the results obtained using k0-standardised Instrumental Neutron Activation Analysis (k0-INAA) for more than 20 trace elements in 20 different beauty products collected from the European market are presented. We
found traces of Ba, As and Sb which is in breach with European legislation. For some of the other elements like Cr and Co
further speciation is needed in order to evaluate their presence in beauty products.