MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Bone conditioning and chemical characterization of Commerson?s dolphin (Cephalorhynchus c. commersonii) samples using SEM-EDS
Autor/es:
CÁCERES SAEZ, I.; AYALA, C.; DELLABIANCA, N.; PÉREZ CATÁN, S; GOODALL, R.N.P.; CAPPOZZO, L.
Lugar:
Bahía Blanca, Argentina
Reunión:
Congreso; II Reunión Argentina de geoquímica de la superficie; 2012
Institución organizadora:
IADO - CONICET, UNS
Resumen:
A Scanning Electron Microscope (SEM) in arrangement with an Energy Dispersive Spectrometer (EDS) was used to analyze small bone pieces of Commerson?s dolphin (C. c. commersonii) from Tierra del Fuego, Argentina (TdF-Arg). In this study we explored the potential of utilizing an analytical and non-destructive technique, the SEM-EDS, to characterize a number of museum bone pieces. Moreover we present a simple method for cleaning and conditioning bone samples for the microanalysis. Our results show that in this species bone mineral (Ca and P) proportions and other major elements such as Na and Mg were comparable between the sexes. Differences in Ca and Mg for age-class were found. Potassium, Zn and Fe were found in 11, 62 and 90% of the samples, respectively. Also, uncommon elements were identified: Cl, Al, and in a few samples S, which may represent contamination during the cleaning process of the museum pieces. The SEM-EDS is a potential technique that allows the elemental analysis of scientific reference collections and their temporal comparison.