Department of Chemistry, University of Puerto Rico, Mayagüez, Puerto Rico 00681.
Appl Spectrosc. 2013 Feb;67(2):181-6. doi: 10.1366/11-06229.
A standoff detection system was assembled by coupling a reflecting telescope to a Fourier transform infrared spectrometer equipped with a cryo-cooled mercury cadmium telluride detector and used for detection of solid-phase samples deposited on substrates. Samples of highly energetic materials were deposited on aluminum substrates and detected at several collector-target distances by performing passive-mode, remote, infrared detection measurements on the heated analytes. Aluminum plates were used as support material, and 2,4,6-Trinitrotoluene (TNT) was used as the target. For standoff detection experiments, the samples were placed at different distances (4 to 55 m). Several target surface temperatures were investigated. Partial least squares regression analysis was applied to the analysis of the intensities of the spectra obtained. Overall, standoff detection in passive mode was useful for quantifying TNT deposited on the aluminum plates with high confidence up to target-collector distances of 55 m.
一个对峙检测系统是通过将反射望远镜与傅里叶变换红外光谱仪耦合组装而成的，该光谱仪配备了一个制冷汞镉碲探测器，用于检测沉积在基底上的固相样品。将高能材料的样品沉积在铝基底上，并通过对加热的分析物进行被动模式、远程、红外检测测量，在几个收集器-目标距离处进行检测。铝片被用作支撑材料，2,4,6-三硝基甲苯（TNT）被用作目标。对于远距离检测实验，将样品放置在不同的距离（4 到 55 米）处。研究了几个目标表面温度。对获得的光谱强度进行了偏最小二乘回归分析。总的来说，在被动模式下的远距离检测对于定量检测沉积在铝片上的 TNT 非常有用，置信度高达 55 米的目标-收集器距离。
