Detection of Aromatic Nitro Compounds Using Preconcentrator and SPR Immunosensor

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  • Onodera Takeshi
    Graduate School of Information Science and Electrical Engineering, Kyushu University
  • Miyahara Kazuhisa
    Graduate School of Information Science and Electrical Engineering, Kyushu University
  • Iwakura Munehiro
    Graduate School of Information Science and Electrical Engineering, Kyushu University
  • Hayashi Kenshi
    Graduate School of Information Science and Electrical Engineering, Kyushu University
  • Miura Norio
    Art, Science and Technology Center for Cooperative Research, Kyushu University
  • Matsumoto Kiyoshi
    Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
  • Toko Kiyoshi
    Graduate School of Information Science and Electrical Engineering, Kyushu University

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Abstract

In this study, we report the sensitive detection of aromatic nitro compounds using a surface plasmon resonance (SPR) immunosensor based on the indirect competitive method. The vapors from the substances were sampled with a preconcentrator developed here. The solutions of the sampled vapors were measured using SPR immunosensor. Three kinds of explosives such as 2,4-dinitrobenzene, 2,4-dinitrotoluene, and 2,4,6-trinitrotoluene were detected at 1 ppb. Sampling time at 1 l/min was 3 min. Total detection time was brought down to 5 min, which is relatively short for second scanning in landmine detection. Efforts are being made to integrate the SPR immunosensor and preconcentrator for rapid sensitive detection of nitro aromatic compounds under simulated field conditions.

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