真空紫外光イオン化高分解能飛行時間型質量分析による大気圧下微量有害物のリアルタイム（１秒）検出装置の開発

概要

論文の詳細を見る
Development of a real-time and high-resolution detection system for inspection of trace-level harmful substances at airports or stations is strongly required. A rapid sampling method and vacuum ultraviolet (VUV) light ionization time-of-flight mass spectrometry with high-resolution have been studied to enable 1 s detection. In order to get a high-resolution, the multi-turn type time-of-flight mass spectrometer (TOFMS) was selected. The maximum mass resolution of 6500 was attained for benzene molecular ion (m/z 78) generated by VUV light photoionization. In order to evaluate sensitivity of the real-time detection, trace-level 2,3-dimethyl-2,3-dinitrobutane (DMNB) and triacetone triperoxide (TATP) on stainless steel sheets were examined. Consequently DMNB was successfully detected within 1 s and the detection limit was 0.04 μg. Also TATP was successfully detected within 1 s and the detection limit was 0.2 μg.