期刊
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷 12, 期 -, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2011GC003686
关键词
Diffuse Reflectance Fourier Transform Infrared Spectrometry (DRIFTS); Visible Near Infrared Spectroscopy (VNIRS); total inorganic carbon (TIC); total organic carbon (TOC)
资金
- International Continental Scientific Drilling Program (ICDP)
- German Science Foundation (DFG)
- Swiss National Funds (SNF)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Swedish Research Council (VR), FORMAS
- Kempe foundation
- University of Bremen
- University of Umea
Analysis of sediment samples in the visible to mid infrared (IR) region requires small amounts of sample material and enables rapid and cost efficient geochemical analysis of mineral and organic sediment components. Here we use geochemical properties (total organic and inorganic carbon, biogenic silica, total nitrogen) from the ICDP deep drilling project PASADO to compare three different IR spectroscopy techniques: Diffuse Reflectance Fourier Transform IR Spectrometry (DRIFTS), Attenuated Total Reflectance Fourier Transform IR Spectroscopy (ATR-FTIRS) and Visible Near IR Spectroscopy (VNIRS). ATR-FTIRS and VNIRS are more rapid techniques compared to DRIFTS. Results show that calibration models developed using DRIFTS are most robust (correlation coefficient: R = 0.92 for TIC, R = 0.84 for BSi, R = 0.97 for TOC, R = 0.95 for TN). However, good statistical performance was also obtained by using ATR-FTIRS and VNIRS. When time and costs are limiting factors, these tools may be given preference for rapid biogeochemical screening.
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