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  • 1 LNETI-Laboratório Nacional de Engenharia e Tecnologia Industrial Estrada do Paço do Lumiar 1699 Lisboa, Codex (Portugal)
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Instrumental neutron activation, atomic absorption spectroscopy and conventional methods of analysis were used on eight different silicate rocks and two minerals. Trace elements and major constituents were determined. It was considered that the methods should be regarded as complementary analytical techniques.