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首页> 外文期刊>Applied Spectroscopy: Society for Applied Spectroscopy >Detection of Highly Energetic Materials on Non-Reflective Substrates Using Quantum Cascade Laser Spectroscopy
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Detection of Highly Energetic Materials on Non-Reflective Substrates Using Quantum Cascade Laser Spectroscopy

机译：量子级联激光光谱法检测非反射基材上的高能材料

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摘要

A quantum cascade laser spectrometer was used to obtain the reflection spectra of highly energetic materials (HEMs) deposited on nonideal, low-reflectivity substrates, such as travel-bag fabric (polyester), cardboard, and wood. Various deposition methods were used to prepare the standards and samples in the study. The HEMS used were the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT), the aliphatic nitrate ester pentaerythritol tetranitrate (PETN), and the aliphatic nitramine 1,3,5-trinitroperhydro-1,3,5-triazine (RDX). Chemometrics algorithms were applied to analyze the recorded spectra. Partial least squares (PLS) regression analysis was used to find the best correlation between the infrared signals and the surface concentrations of the samples, and PLS combined with discriminant analysis (PLS-DA) was used to discriminate, classify, and identity similarities in the spectral datasets. Several preprocessing steps were applied to prepare the mid-infrared spectra of HEMs deposited on the target substrates. The results demonstrate that the infrared vibrational method described in this study is well suited for the rapid screening analysis of HEMs on low-reflectivity substrates when a supervised model has been previously constructed or when a reference spectrum of the clean substrate can be acquired to be subtracted from the HEM-substrate spectrum.
机译：量子级联激光光谱仪用于获得沉积在非理想，低反射率基材（例如旅行袋织物（聚酯），纸板和木材）上的高能材料（HEM）的反射光谱。研究中使用了各种沉积方法来制备标准品和样品。使用的HEMS是硝基芳族炸药2,4,6-三硝基甲苯（TNT），脂肪族硝酸酯季戊四醇四硝酸酯（PETN）和脂肪族硝胺1,3,5-三硝基过氢-1,3,5-三嗪（RDX） 。应用化学计量学算法分析记录的光谱。偏最小二乘（PLS）回归分析用于发现红外信号与样品表面浓度之间的最佳相关性，PLS与判别分析（PLS-DA）结合用于对样品中的相似度进行区分，分类和同一性光谱数据集。应用了几个预处理步骤来准备沉积在目标基板上的HEM的中红外光谱。结果表明，本研究中描述的红外振动方法非常适合用于低反射率基板上的HEM的快速筛选分析，前提是已预先构建了监督模型或可以获取干净基板的参考光谱以进行减去从HEM底物光谱中获得。

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