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<p>Rapid and reliable detection of trace explosives is a critical requirement for aviation security and defense applications. Conventional standalone ion mobility spectrometry (IMS) provides portability and high sensitivity but suffers from limited resolving power and susceptibility to ion suppression, which can result in false positives or negatives. In this study, we present a hybrid analytical platform integrating a flow-field thermal-gradient gas chromatograph (FF-TG-GC) with a tandem differential ion mobility spectrometer (DMS-DMS). The FF-TG-GC enables rapid, high-resolution separation of multiple nitroaromatic and peroxidic explosives, including TNT, RDX, PETN, and TATP, within seconds. The tandem DMS configuration enhances selectivity and overall analytical robustness by exploiting unique ion mobility patterns and compensating for matrix effects. The system was rigorously evaluated in the presence of common interferents such as diesel fuel, Javon musk, and lactic acid vapors, simulating realistic airport environments. Chromatographic pre-separation effectively minimizes ion competition and suppression, while tandem DMS allows accurate and reproducible discrimination of target analytes from background compounds. Experimental results demonstrate that the integrated platform achieves high-throughput, reproducible, and selective trace detection, even under challenging operational conditions. This approach provides a reliable and rapid screening methodology suitable for deployment at aviation security checkpoints, offering both operational efficiency and analytical confidence.</p>

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Rapid trace explosive screening using high-speed GC coupled with tandem DMS for aviation security applications

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Saida Ahmadova,
  • Ramil Mukhtarov

摘要

Rapid and reliable detection of trace explosives is a critical requirement for aviation security and defense applications. Conventional standalone ion mobility spectrometry (IMS) provides portability and high sensitivity but suffers from limited resolving power and susceptibility to ion suppression, which can result in false positives or negatives. In this study, we present a hybrid analytical platform integrating a flow-field thermal-gradient gas chromatograph (FF-TG-GC) with a tandem differential ion mobility spectrometer (DMS-DMS). The FF-TG-GC enables rapid, high-resolution separation of multiple nitroaromatic and peroxidic explosives, including TNT, RDX, PETN, and TATP, within seconds. The tandem DMS configuration enhances selectivity and overall analytical robustness by exploiting unique ion mobility patterns and compensating for matrix effects. The system was rigorously evaluated in the presence of common interferents such as diesel fuel, Javon musk, and lactic acid vapors, simulating realistic airport environments. Chromatographic pre-separation effectively minimizes ion competition and suppression, while tandem DMS allows accurate and reproducible discrimination of target analytes from background compounds. Experimental results demonstrate that the integrated platform achieves high-throughput, reproducible, and selective trace detection, even under challenging operational conditions. This approach provides a reliable and rapid screening methodology suitable for deployment at aviation security checkpoints, offering both operational efficiency and analytical confidence.