Nanoliter segmented-flow sampling mass spectrometry with online compartmentalization.

Nanoliter segmented-flow sampling mass spectrometry with online compartmentalization.
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DOI:
10.1021/ac500365r
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发表时间:
2014-04-01
影响因子:
7.4
通讯作者:
Turecek, Frantisek
Turecek, Frantisek
中科院分区:
化学1区
文献类型:
--
作者:
Volny, Michael;Rolfs, Joelle;Hakimi, Bejan;Frycak, Petr;Schneider, Thomas;Liu, Dingsheng;Yen, Gloria;Chiu, Daniel T.;Turecek, Frantisek

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We report a microfluidic device, using segmented flow in a two-phase system of immiscible liquids, which delivers aqueous droplets into a modified commercial mass spectrometer. The interface coupling the microfluidics to the mass spectrometer achieves up to 96% sample transfer efficiency to the vacuum chamber. Sample ionization is assisted by multipass infrared laser beam in the interface. The system achieves low femtomole detection limits of several analytes ranging from drugs to proteins. Sample ionization in this segmented-flow sampling was found to be remarkably insensitive to the presence of buffer salts and other matrices.
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