Comparative study of infrared techniques for fast biogeochemical sediment analyses
Comparative study of infrared techniques for fast biogeochemical sediment analyses
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DOI：
10.1029/2011gc003686
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发表时间：
2011-10
期刊：
影响因子：
3.7
通讯作者：
A. Hahn;P. Rosén;P. Kliem;C. Ohlendorf;B. Zolitschka
中科院分区：
文献类型：
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作者：
A. Hahn;P. Rosén;P. Kliem;C. Ohlendorf;B. Zolitschka
在可见到中红外（IR）区域分析沉积物样品需要少量的样品材料，并且能够快速和经济高效地对矿物和有机沉积物成分进行地球化学分析。在这里，我们使用来自ICDP PASADO深钻项目的地球化学性质（总有机碳和无机碳，生物硅，总氮）来比较三种不同的红外光谱技术：漫反射傅里叶变换红外光谱（DRIFTS），衰减全反射傅里叶变换红外光谱（ATR‐FTIRS）和可见近红外光谱（VNIRS）。与DRIFTS相比，ATR - FTIRS和VNIRS是更快的技术。结果表明，利用DRIFTS建立的校正模型最具鲁棒性（相关系数：TIC = 0.92, BSi = 0.84, TOC = 0.97, TN = 0.95）。然而，使用ATR - FTIRS和VNIRS也获得了良好的统计性能。当时间和成本是限制因素时，这些工具可能优先于快速生物地球化学筛选。
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.