Eiceman G A, Salazar M R, Rodriguez M R, Limero T F, Beck S W, Cross J H, Young R, James J T
Department of Chemistry, New Mexico State University, Las Cruces 88003-0001.
Anal Chem. 1993;65:1696-702. doi: 10.1021/ac00061a011.
Hydrazine (HZ) and monomethylhydrazine (MMH) in air were monitored continuously using a hand-held ion mobility spectrometer equipped with membrane inlet, 63Ni ion source, acetone reagent gas, and ambient temperature drift tube. Response characteristics included detection limit, 6 ppb; linear range, 10-600 ppb; saturated response, >2 ppm; and stable response after 15-30 min. Ammonia interfered in hydrazines detection through a product ion with the same drift time as that for MMH and HZ. Acetone reagent gas was replaced with 5-nonanone to alter drift times of product ions and separate ammonia from MMH and HZ. Patterns in mobility spectra, ion identifications from mass spectra, and fragmentation cross-sections from collisional-induced dissociations suggest that drift times are governed by ion-cluster equilibria in the drift region of the mobility spectrometer. Practical aspects including calibration, stability, and reproducibility are reported from the use of a hand-held mobility spectrometer on the space shuttle Atlantis during mission STS-37.
使用配备膜进样口、⁶³Ni离子源、丙酮反应气和环境温度漂移管的手持式离子迁移谱仪对空气中的肼（HZ）和一甲基肼（MMH）进行连续监测。响应特性包括检测限6 ppb；线性范围10 - 600 ppb；饱和响应>2 ppm；15 - 30分钟后响应稳定。氨通过与MMH和HZ具有相同漂移时间的产物离子干扰肼的检测。将丙酮反应气替换为5 - 壬酮以改变产物离子的漂移时间并将氨与MMH和HZ分离。迁移谱图中的模式、质谱中的离子鉴定以及碰撞诱导解离的碎裂截面表明，漂移时间由迁移谱仪漂移区域中的离子簇平衡决定。报告了在STS - 37任务期间在亚特兰蒂斯号航天飞机上使用手持式迁移谱仪的实际情况，包括校准、稳定性和重现性。
