The Quantitative Analysis of Sugar Maple Tree Rings by Laser Ablation in Conjunction with ICP‐MS
- 1 September 1998
- journal article
- technical report
- Published by Wiley in Journal of Environmental Quality
- Vol. 27 (5) , 1087-1094
- https://doi.org/10.2134/jeq1998.00472425002700050014x
Abstract
This study reports on the quantitative analysis of sugar maple (Acer saccharum Marsh.) tree rings by laser‐ablation ICP‐MS (LAS). Differences in ablation were corrected using 13C as an internal standard. Spatial variation in element distribution within individual tree rings was low, allowing individual tree rings to be used as calibration standards. The relative standard deviation (RSD) for element concentrations within tree rings were 15% for Mg, 15% for Ca, 9% for K, and 16% for Pb. This variation is likely due to element distribution and not the ablation process; the RSD for 13C was −1, were found in tree rings formed between 1940 and 1970, although there was considerable year‐to‐year variation within each tree, and the timing and magnitude of the Pb peaks differed between trees. Lead concentrations decreased in wood formed after 1970 so that by the 1980s, Pb concentrations were around 1 mg kg−1, reflecting changes in Pb deposition into the woodland.Keywords
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