NDLI: Preparation of bone carbonate for stable isotope analysis : the e ff ects of treatment time and acid concentration

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Preparation of bone carbonate for stable isotope analysis : the e ff ects of treatment time and acid concentration

Content Provider	Semantic Scholar
Copyright Year	2004
Abstract	While apatite carbonate C analysis is a useful tool in palaeodietary research, the vulnerability of carbonates to diagenesis necessitates careful sample preparation. The most common preparation method involves dilute acetic acid treatments to remove highly soluble mineral contaminants. However, there is variation in both treatment time and acid concentration. This study addresses the impact of such variation on carbonate C and O, sample loss in solution, and sample Fourier transform infrared spectroscopy (FTIR) characteristics. Samples of fresh and archaeological bone were treated with 1.0 M and 0.1 M acetic acid. Carbonate C and O, sample loss and FTIR characteristics were measured at treatment times of 4 to 24 h. The results suggest that 4 h of treatment suffice to remove highly soluble contaminants, and that longer treatment times can lead to sample recrystallization. Some samples treated with 1.0 M acid showed unacceptable loss or possible recrystallization, suggesting that 0.1 M acid treatment is preferable. However, the more dilute acid caused smaller shifts in C and O for all samples and treatment times. Thus, while 0.1 M acid appears to produce superior sample quality, it may not produce results directly comparable to those of 1.0 M acid treatments. This has important implications for the comparison of apatite carbonate stable isotope values reported in the literature. 2003 Elsevier Ltd. All rights reserved.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://users.clas.ufl.edu/krigbaum/PDFS/Garvie-Lok_etal_JAS_2004.pdf
Language	English
Access Restriction	Open
Subject Keyword	Acetic Acid Apatites Bone Tissue Calcium Carbonate 750 MG Chewable Tablet Carbonates Hearing Loss, High-Frequency Isotopes Small Spectroscopy, Fourier Transform Infrared Spectroscopy, Near-Infrared carboapatite stable isotope
Content Type	Text
Resource Type	Article

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