Pulsed valve matrix-assisted ionization

Pulsed valve matrix-assisted ionization
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DOI:
10.1039/c7an00489c
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发表时间:
2017-05-21
期刊:
影响因子:
4.2
通讯作者:
Murray, Kermit. K.
Murray, Kermit. K.
中科院分区:
化学2区
文献类型:
--
作者:
Banstola, Bijay;Murray, Kermit. K.

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我们开发了一种新的电离方法,利用电致动脉冲阀实现高时间分辨率的基质辅助电离。基质和分析物样品沉积在一层薄的金属箔上,并放置在环境电离质谱仪的入口处。当脉冲阀被启动时,一股短时间的高压气体撞击到铝箔上,并从样品的反面喷出颗粒。质谱仪入口处的粒子形成高电荷态离子。使用该源,在可选择的4秒时间窗口内产生多电荷蛋白质离子。
We have developed a new ionization approach for matrix-assisted ionization with high temporal resolution using an electrically actuated pulsed valve. Matrix and analyte samples are deposited on a thin metal foil and placed at the inlet of an ambient ionization mass spectrometer. When the pulsed valve is actuated, a short puff of high pressure gas impinges on the foil and ejects particulate from the sample on the opposite side. Highly charged ions are formed from the particles at the mass spectrometer inlet. Using this source, multiply charged protein ions are produced within a selectable 4 second time window.