Utilizing Microchip Capillary Electrophoresis Electrospray Ionization for Hydrogen Exchange Mass Spectrometry.
Utilizing Microchip Capillary Electrophoresis Electrospray Ionization for Hydrogen Exchange Mass Spectrometry.
复制标题
DOI:
10.1021/acs.analchem.5b01179
复制
发表时间:
2015-06-16
影响因子:
7.4
通讯作者:
Ramsey, J. Michael
中科院分区:
文献类型:
--
作者:
Black, William A.;Stocks, Bradley B.;Mellors, J. Scott;Engen, John R.;Ramsey, J. Michael
Hydrogen exchange (HX) mass spectrometry (MS) of complex mixtures requires a fast, reproducible, and high peak capacity separation prior to MS detection. The current paradigm relies on liquid chromatography (LC) with fast gradients performed at low temperatures to minimize back exchange. Unfortunately, under these conditions, the efficiency of LC is limited due to resistance to mass transfer, reducing the capability to analyze complex samples. Capillary electrophoresis (CE), on the other hand, is not limited by resistance to mass transfer, enabling very rapid separations that are not adversely affected by low temperature. Previously, we have demonstrated an integrated microfluidic device coupling CE with electrospray ionization (ESI) capable of very rapid and high efficiency separations. In this work, we demonstrate the utility of this microchip CE-ESI device for HX MS. High speed CE-ESI of a bovine hemoglobin pepsin digestion was performed in 1 minute with a peak capacity of 62 versus a similar LC separation performed in 7 minutes with peak capacity of 31. A room temperature CE method performed in 1.25 minutes provided similar deuterium retention as an 8.5 minute LC method conducted at 0 °C. Separation of a complex mixture with CE was done with considerably better speed and nearly triple the peak capacity than the equivalent separation by LC. Overall the results indicate the potential utility of microchip CE-ESI for HX MS.
登录
查看更多内容
影响因子:
7.4
作者:
Mellors, J. Scott;Jorabchi, Kaveh;Smith, Lloyd M.;Ramsey, J. Michael
通讯作者:
Ramsey, J. Michael
影响因子:
7.4
作者:
Chambers, Andrew G.;Mellors, J. Scott;Henley, W. Hampton;Ramsey, J. Michael
通讯作者:
Ramsey, J. Michael
影响因子:
7.4
作者:
Mellors, J. S.;Gorbounov, V.;Ramsey, R. S.;Ramsey, J. M.
通讯作者:
Ramsey, J. M.
影响因子:
7.4
作者:
Busnel, Jean-Marc;Schoenmaker, Bart;Mayboroda, Oleg A.
通讯作者:
Mayboroda, Oleg A.
影响因子:
7.4
作者:
Jiang, LF;Moini, M
通讯作者:
Moini, M