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首页> 外文期刊>Subsurface Sensing Technologies and Applications >High Explosives Mixtures Detection Using Fiber Optics Coupled: Grazing Angle Probe/Fourier Transform Reflection Absorption Infrared Spectroscopy
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High Explosives Mixtures Detection Using Fiber Optics Coupled: Grazing Angle Probe/Fourier Transform Reflection Absorption Infrared Spectroscopy

机译：使用光纤耦合的高爆炸物混合物检测：掠角探针/傅立叶变换反射吸收红外光谱

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摘要

Fourier Transform Infrared Spectroscopy operating in Reflection-Absorption mode has been demonstrated as a potential spectroscopic technique to develop new methodologies for detection of chemicals deposited on metallic surfaces. Mid-IR transmitting optical fiber bundle coupled to an external Grazing Angle Probe and an MCT detector together with a bench Michelson interferometer have been used to develop a highly sensitive and selective methodology for detecting traces of organic compounds on metal surfaces. The methodology is remote sensed, in situ and can detect surface loading concentrations of nanograms/cm~2 of most target compounds. It is an environmentally friendly, solvent free technique that does not require sample preparation. In this work, the ever-important task of high explosives detection, present as traces of neat crystalline forms and in lab-made mixtures, equivalent to the important explosive formulation Pentolite, has been addressed. The sample set consisted of TNT, PETN (both pure samples) and the formulation based on them: Pentolite, present in various loading concentrations. The spectral data collected was subjected to a number of statistical pre-treatments, including first derivative and normalization transformations to make the data more suitable for the analysis. Principal Components Analysis combined with Linear Discriminant Analysis allowed the classification and discrimination of the target analytes contained in the sample set. Loading concentrations as 220 ng/cm~2 were detected for each explosive in neat form and the in the simulated mixture of Pentolite.
机译：已经证明以反射吸收模式操作的傅立叶变换红外光谱法是一种潜在的光谱技术，可用于开发检测沉积在金属表面的化学物质的新方法。与外部掠角探测器和MCT检测器以及台式迈克尔逊干涉仪耦合的中红外传输光纤束已被用于开发一种高灵敏度和选择性的方法，用于检测金属表面上的痕量有机化合物。该方法是原位遥感的，可以检测大多数目标化合物的表面负载浓度（纳克/ cm〜2）。这是一种环保，无溶剂的技术，不需要样品制备。在这项工作中，已经解决了重要的任务，即以纯净的结晶形式和实验室混合物形式存在的痕量炸药，这与重要的炸药配方Pentolite相当。样品组由TNT，PETN（均为纯样品）和基于它们的配方组成：膨润土，以各种上样浓度存在。对收集的光谱数据进行了许多统计预处理，包括一阶导数和归一化转换，以使数据更适合于分析。主成分分析与线性判别分析相结合，可以对样品集中包含的目标分析物进行分类和区分。每种爆炸物的纯净形式和模拟的五角石混合物中的装填浓度均为220 ng / cm〜2。

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    Oliva M. Primera-Pedrozo; Yadira M. Soto-Feliciano; Leonardo C. Pacheco-Londono; Samuel P. Hernandez-Rivera;

  • 作者单位

    Center for Chemical Sensors Development/Chemical Imaging Center, Department of Chemistry, University of Puerto Rico, Mayagueez, Mayagueez, 9019, San Juan 00681-9019, PR, USA;

    Center for Chemical Sensors Development/Chemical Imaging Center, Department of Chemistry, University of Puerto Rico, Mayagueez, Mayagueez, 9019, San Juan 00681-9019, PR, USA;

    Center for Chemical Sensors Development/Chemical Imaging Center, Department of Chemistry, University of Puerto Rico, Mayagueez, Mayagueez, 9019, San Juan 00681-9019, PR, USA;

    Center for Chemical Sensors Development/Chemical Imaging Center, Department of Chemistry, University of Puerto Rico, Mayagueez, Mayagueez, 9019, San Juan 00681-9019, PR, USA;

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  • 正文语种 eng
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  • 关键词

    grazing angle probe; RAIRS; TNT; PETN; pentolite;

    机译：掠角探测器RAIRS;TNT;PETN;膨润土;

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