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Tandem differential mobility ion mobility spectrometer for chemical vapor detection
Tandem differential mobility ion mobility spectrometer for chemical vapor detection
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机译:串联差分迁移率离子迁移谱仪,用于化学蒸气检测
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摘要
A DMS-IMS chemical sensing system employs two ion-separation technologies in tandem to extract signals of specific chemicals from the glut of signals present. The sensing system generally includes an atmospheric pressure ion generation system, a Differential Mobility (DMS) system, a time-of-flight IMS (TOF-IMS) system, and an ion detector system. The DMS extracts a narrow range of trace chemicals from an environmental sample for subsequent analysis, and a TOF-IMS then analyzes the resulting narrow range of isolated chemicals, allowing compound-specific detection thresholds at sub-ppb concentrations.
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