| 近红外反射光谱学在岩石矿物研究中的应用Ⅱ.快速测定地质样品中有机质 |
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| 引用本文： | 龙梅,裴世桥.近红外反射光谱学在岩石矿物研究中的应用Ⅱ.快速测定地质样品中有机质[J].岩矿测试,2004,23(1):6-10. |
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| 作者姓名： | 龙梅 裴世桥 |
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| 作者单位： | 中国地质大学化学分析室,北京,100083 |
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| 摘 要： | 利用偏最小二乘法回归的多变量校正方式,建立了应用近红外反射光谱学方法无损快速测定各种地质样品中有机质的模型.设计了多重散射光校正、标准正常变量转换及导数光谱,扣除额外基线和重叠信号的影响,分离出与有机质含量有关的光谱信息.大多数地质样品的有机质近红外反射光谱估算结果与化学法符合.
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| 关 键 词： | 近红外反射光谱学 有机质 地质样品 偏最小二乘回归法 二阶导数光谱 |
| 文章编号： | 0254-5357(2004)01-0006-05 |
| 修稿时间： | 2003年5月7日 |
Study on Application of Near-Infrared Reflectance Spectroscopy in Rock and Mineral Analysis Ⅱ.Rapid Determination of Organic Matter in Geological Samples |
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| LONG Mei,PEI Shi-qiao.Study on Application of Near-Infrared Reflectance Spectroscopy in Rock and Mineral Analysis Ⅱ.Rapid Determination of Organic Matter in Geological Samples[J].Rock and Mineral Analysis,2004,23(1):6-10. |
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| Authors: | LONG Mei PEI Shi-qiao |
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| Abstract: | A quicker method is developed based on a multivariate calibration procedure using partial least squares (PLS) regression to establish a relationship between the organic matter content in geological samples determined by conventional chemical measurements and by diffuse NIR reflectance spectroscopy. Several spectral pre-processing methods \ were employed to improve the robustness and performance of the calibration models. Relevant information related to the organic matter in the NIR region was successfully extracted. NIR prediction results showed that application of the calibration models for quantifing the organic matter content in the geological samples is promising. |
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| Keywords: | near-infrared (NIR) reflectance spectroscopy organic matter geological sample partial least squares (PLS) regression second derivation algorithm |
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