Fourier transform infrared spectroscopy,a new cost-effective tool for quantitative analysis of biogeochemical properties in long sediment records |
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| Authors: | Hendrik Vogel Peter Rosén Bernd Wagner Martin Melles Per Persson |
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| Institution: | 1.Institute of Geology and Mineralogy,University of Cologne,Cologne,Germany;2.Climate Impacts Research Centre (CIRC),Ume? University,Abisko,Sweden;3.Department of Chemistry,Ume? University,Umea,Sweden |
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| Abstract: | Measurements of Fourier transform infrared spectroscopy (FTIRS) in the mid-infrared (MIR) region were conducted on sedimentary
records from Lake El’gygytgyn, NE Siberia, and Lake Ohrid, Albania/Macedonia. Calibration models relating FTIR spectral information
to biogeochemical property concentrations were established using partial least squares regression (PLSR). They showed good
statistical performance for total organic carbon (TOC), total nitrogen (TN), and biogenic silica (opal) in the sediment record
from Lake El’gygytgyn, and for TOC, total inorganic carbon (TIC), TN, and opal in sediments from Lake Ohrid. In both cases,
the calibration models were successfully applied for down-core analysis. The results, in combination with the small amount
of sample material needed, negligible sample pre-treatments, and low costs of analysis, demonstrate that FTIRS is a promising,
cost-effective tool that allows high-resolution paleolimnological studies. |
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| Keywords: | Fourier transform infrared spectroscopy Biogeochemistry Biogenic silica Paleolimnology Lake El’ gygytgyn Lake Ohrid |
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