Abstract Number: 676 Working Group: Instrumentation and Methods
Abstract In the present work, Surface-discharge Microplasma Device (SMD) was applied to ion mobility measurement under atmospheric conditions. We designed a simple ion-mobility spectrometer (IMS) with the SMD. The SMD ion mobility spectrometer ionizes gaseous species in carrier gas with pulsed surface discharge and ionized gaseous species migrate toward to the collecting electrode where the ion current is recorded as a function of flight time. Since the SMD employs surface discharge and is capable of generating uniform and high-concentration unipolar ions over a wide area in the vicinity of discharge electrode, the detection limit of ion current can be lowered by increasing the length of discharge electrode. By analyzing the time dependency of ion current we may identify ion species and ion concentration.