INVESTIGADORES
VALENZUELA Luciano Oscar
artículos
Título:
Strontium isotope ratios of human hair from the United States: Patterns and aberrations
Autor/es:
TIPPLE, BRETT J; VALENZUELA, LUCIANO O; CHAU, THUAN; HU, LIHAI; BATAILLE, CLEMENT; CHESSON, LESLEY A; EHLERINGER, JAMES R
Revista:
RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM.
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Lugar: Londres; Año: 2019 vol. 33 p. 461 - 472
ISSN:
0951-4198
Resumen:
RATIONALE: Strontium isotope ratios (87Sr/86Sr) of hair may be a valuable tool to estimate human provenance. However, the systematics and mechanisms controlling spatial variation in 87Sr/86Sr of modern human hair remain unclear. Here, we measure 87Sr/86Sr of hair specimens from across the USA to assess the presence of geospatial relationships.METHODS: Ninety-eight human hair specimens were collected from salon/barbershop floors in 48 municipalities throughout the conterminous USA. [Sr] and 87Sr/86Sr were measured from hair using quadrupole and multi-collector inductively coupled plasma mass spectrometers, respectively. [Sr] and 87Sr/86Sr of hair were compared to measured [Sr] and 87Sr/86Sr of tap waters from the collection locations. In addition, the 87Sr/86Sr of hair was compared to modeled 87Sr/86Sr of bedrock and surface waters.RESULTS: Hair color was independent of 87Sr/86Sr, but related to [Sr]. 87Sr/86Sr of hair and leachate were not statistically different and were positively correlated; however, in several hair-leachate pairs 87Sr/86Sr ratios were conspicuously different. 87Sr/86Sr of both hair and leachate were linearly correlated with tap water. 87Sr/86Sr of hair was also significantly correlated with modeled 87Sr/86Sr of bedrock and surface waters, although 87Sr/86Sr of hair was most strongly correlated to measured 87Sr/86Sr of tap water.CONCLUSIONS: 87Sr/86Sr of hair related to the 87Sr/86Sr of tap water, which varied geographically. The 87Sr/86Sr of hair provided geographic information about an individual?s recent residence. Differences in 87Sr/86Sr of hair and hair leachate may be concomitant with travel and could potentially be used as a screening tool to identify recent movements.
