Field measurement of positive ion mobility and mass spectra at a Colorado site in winter
Field measurement of positive ion mobility and mass spectra at a Colorado site in winter
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DOI：
10.1029/1998jd100063
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发表时间：
1999-02-20
影响因子：
4.4
通讯作者：
Eisele, FL
中科院分区：
文献类型：
--
作者：
Nagato, K;Tanner, DJ;Eisele, FL
在冬季测量了近地面正离子的迁移率和质谱。从环境空气中产生的和在0.1-s范围内老化的正离子的迁移率分布强烈依赖于空气温度。在低温下，在迁移率> 1.5cm（2）V-1 s（-1）的范围内观察到两个峰，分别为H_3O ~+和NH ~（4+）团簇。迁移率185.6 kcal/mol（来自乙醇H（+））或>194.1/mol（来自丙酮H（+））的离子。质谱包含NH 4+团簇和许多延伸至最高扫描质量（450 amu）的未识别峰。在>200 amu的高质量范围内的离子也显示出类似于具有较低迁移率的离子的温度依赖性。
Mobility and mass spectra of positive ions were measured near ground level in winter time. The mobility distribution of positive ions generated from ambient air and aged in the 0.1-s range is strongly dependent on air temperature. At low temperature, two peaks were observed in the mobility range >1.5 cm(2) V-1 s(-1) and interpreted as H3O+ and NH4+ clusters. Ions with mobilities 185.6 kcal/mol (from ethanolH(+)) or >194.1/mol (from acetoneH(+)). The mass spectra contain NH4+ clusters and numerous unidentified peaks extending to the highest mass scanned, 450 amu. Ions in the high mass range >200 amu also show temperature dependence similar to ions with lower mobilities.