Detection of the explosive nitroaromatic compound simulants with chemosensory systems based on quartz crystal microbalance and chemiresistive sensor arrays

IF 1.1 Q4 QUANTUM SCIENCE & TECHNOLOGY
Z.I. Kazantseva, I.A. Koshets, A.V. Mamykin, A.S. Pavluchenko, O.L. Kukla, A.A. Pud, N.A. Ogurtsov, Yu.V. Noskov, R.V. Rodik, S.G. Vyshnevskyy
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引用次数: 1

Abstract

The work is devoted to investigations of possibility of rapid detection and subsequent identification of explosive substances by using the arrays of two types of sensor elements: quartz crystal microbalances and chemiresistive electrodes. Thin layers of calixarene compounds and composites of electrically conductive polymers, respectively, were used as the sensitive coatings. Several types of nitroaromatic compounds from nitrotoluene series were chosen as simulants of explosive substances: O-Nitrotoluene (2-MNT) and Nitrobenzene (MNB), the concentration of these volatile compounds varied from 10 to 100 ppm. The observed detection threshold, depending on the type of analyzed explosive simulants, was within the range of 1 to 10 ppm for quartz crystal sensors with calixarene sensitive films, and the response time was within 10…20 s for quartz crystal sensors and up to 1 min for chemiresistive sensors. It has been shown that among the tested calixarenes there are samples with high selective sensitivity. The possibility of qualitative identification of explosives at relatively low concentrations by using the statistical methods of chemical patterns recognition (the so-called “electronic nose”) has been demonstrated.
基于石英晶体微天平和化学电阻传感器阵列的化学传感系统检测爆炸性硝基芳香族化合物模拟物
这项工作致力于通过使用石英晶体微天平和化学电阻电极两种类型的传感器元件阵列来研究快速检测和随后识别爆炸性物质的可能性。薄层杯芳烃化合物和导电聚合物的复合材料分别被用作敏感涂层。从硝基甲苯系列中选取几种类型的硝基芳香族化合物作为爆炸性物质的模拟物:o -硝基甲苯(2-MNT)和硝基苯(MNB),这些挥发性化合物的浓度从10到100 ppm不等。观察到的检测阈值,取决于所分析的爆炸模拟物的类型,对于杯芳烃敏感膜的石英晶体传感器在1到10 ppm的范围内,石英晶体传感器的响应时间在10…20秒内,化学电阻传感器的响应时间长达1分钟。结果表明,在所测杯芳烃中,有一些样品具有较高的选择灵敏度。已经证明,利用化学模式识别的统计方法(所谓的“电子鼻”)可以定性地识别浓度相对较低的炸药。
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来源期刊
CiteScore
1.80
自引率
22.20%
发文量
43
审稿时长
15 weeks
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