Tandem differential mobility spectrometry in purified air for high-speed selective vapor detection.
Tandem differential mobility spectrometry in purified air for high-speed selective vapor detection.
复制标题
纯化空气中的串联差分迁移光谱法，用于高速选择性蒸气检测。
DOI：
10.1021/ac4031169
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发表时间：
2014
影响因子：
7.4
通讯作者：
G. Eiceman
中科院分区：
文献类型：
--
作者：
M. Menlyadiev;G. Eiceman
一个串联的离子迁移率仪器的基础上差分迁移率光谱（DMS）被用来证明选择性的响应，通过在环境压力下的净化空气中的离子迁移率的场依赖性的差异。化学选择性的概念，仅仅从特征色散曲线或从场依赖性的离子迁移率的实验证明了在三个步骤与混合物的复杂性增加。在碳原子数为4及以下的四种醇的混合物中，施加到第一和第二DMS级的不同的分离电压和补偿电压对允许离子从各个物质中分离，而没有可检测水平的其他物质。在酮，醇和有机磷化合物的三组分混合物中，使用每个DMS级上的特定和特征分离和补偿电压观察到相同水平的离子隔离。在最后一个实验中，从来自四个化学基团的23种挥发性有机化合物的混合物中分离单个物质的产物离子是不完全的，尽管分析物信号与化学噪声的比率的改善被计算为DMMP为31，1-己醇为106。这些研究结果表明，分散曲线中可用的化学信息可以通过串联DMS测量在响应时间低于100 ms的情况下访问。
A tandem ion mobility instrument based on differential mobility spectrometry (DMS) was used to demonstrate selectivity in response through differences in field dependence of mobility for ions in purified air at ambient pressure. The concept of chemical selectivity solely from characteristic dispersion curves or from field dependence of ion mobility was experimentally demonstrated in three steps with mixtures of increasing complexity. In a mixture of four alcohols with carbon numbers four and below, distinct pairs of separation voltage and compensation voltage, applied to the first and second DMS stages, permitted isolation of ions from individual substances without detectable levels of other substances. In a three-component mixture of a ketone, alcohol, and organophosphorus compound, the same level of ion isolation was observed using specific and characteristic separation and compensation voltages on each DMS stage. In the last experiment, the isolation of product ions of individual substances from a mixture of 23 volatile organic compounds from four chemical groups was incomplete though the improvement in the ratio of analyte signal to chemical noise was calculated as 31 for DMMP and 106 for 1-hexanol. These findings demonstrate that chemical information available in dispersion curves can be accessed in response times below 100 ms through a tandem DMS measurement.
影响因子：
15
作者：
Wang, Sheila C.;Politis, Argyris;Robinson, Carol V.
通讯作者：
Robinson, Carol V.
影响因子：
7.4
作者：
Schneider, Bradley B.;Covey, Thomas R.;Coy, Stephen L.;Krylov, Evgeny V.;Nazarov, Erkinjon G.
通讯作者：
Nazarov, Erkinjon G.
影响因子：
7.4
作者：
Levin, Daren S.;Miller, Raanan A.;Vouros, Paul
通讯作者：
Vouros, Paul