Jump to main content
Jump to site search

Issue 5, 2007
Previous Article Next Article

Sr isotope analysis of bird feathers by TIMS: a tool to trace bird migration paths and breeding sites

Author affiliations

Abstract

Here we present a methodology to analyse 87Sr/86Sr isotope ratios in bird feathers with very low Sr concentration using ultra-low blank ion-exchange chemistry combined with thermal ionisation mass spectrometry. For this study, Sedge Warbler (Acrocephalus schoenobaenus) feathers were used from four different locations within Europe. Prior to analyses, dust particles from the feathers’ surface were removed with nitrogen gas. The shaft and the vane parts of the feather were analysed separately. Generally, the vane had higher trace element abundances compared to the shaft. The vane contained between 3 ng and 12 ng of Sr and the shaft between 0.5 ng and 3 ng of Sr. Due to the small amount of Sr in the feathers, small loads (0.5–12 ng Sr) of international standard NBS 987 were analysed for 87Sr/86Sr isotope ratios giving an average of 0.710263 ± 0.000013 (2σ) (n = 177) and an external reproducibility below 0.002%. The average 88Sr beam intensities for all the shaft analyses were 0.79 V while for the vane analyses it was 2.7 V, consistent with the measured Sr contents of the feather shafts and vanes. The 87Sr/86Sr isotope ratios of the vane were more precise than the shaft with 2 SD internal precision of 0.0026% and 0.053%, respectively. However, the precision was adequate for resolving Sr isotope variations between localities. The 87Sr/86Sr isotope ratios of the cleaned Sedge Warbler feathers varied geographically and were indicative of the different geology in the locations where the feathers were grown.

Graphical abstract: Sr isotope analysis of bird feathers by TIMS: a tool to trace bird migration paths and breeding sites

Back to tab navigation

Publication details

The article was received on 08 Nov 2006, accepted on 08 Feb 2007 and first published on 23 Feb 2007


Article type: Paper
DOI: 10.1039/B616328A
Citation: J. Anal. At. Spectrom., 2007,22, 513-522

  •   Request permissions

    Sr isotope analysis of bird feathers by TIMS: a tool to trace bird migration paths and breeding sites

    L. Font, G. M. Nowell, D. Graham Pearson, C. J. Ottley and S. G. Willis, J. Anal. At. Spectrom., 2007, 22, 513
    DOI: 10.1039/B616328A

Search articles by author

Spotlight

Advertisements