Dual-channel electrospray microchip.
نویسندگان
چکیده
A dual-channel electrospray microchip has been developed for electrospray ionization mass spectrometry (ESI-MS) where aqueous samples are mixed at the Taylor cone with an organic buffer. Due to the fast and effective mixing in the Taylor cone, the aqueous sample can be well ionized with a high ion intensity. The influence of geometric parameters such as the distance between the two microchannels at their junction at the tip of the emitter has been investigated together with chemical parameters such as the organic buffer composition.
منابع مشابه
Microfabricated dual sprayer for on-line mass tagging of phosphopeptides.
Phosphopeptides tagging reactions by dinuclear zinc(II) complexes (1,3-bis[bis(2-pyridylmethyl)amino]-propan-2-olato dizinc(II)3+, called tag) were performed with a dual-channel microsprayer in electrospray ionization mass spectrometry. The reaction is first studied ex situ and analyzed with a commercial electrospray source. In situ reactions (i.e., inside the Taylor cone) were achieved with a ...
متن کاملDual-channel Dual-electrode Microchip Electrophoresis with Electrochemical Detection for Voltammetric Identification of Cellular Nitrosative and Oxidative Stress Markers
This paper describes the development of a dual-channel microchip in a dual-parallel electrode configuration for voltammetric characterization of analytes in real time. The microchip system contains two distinct separation channels, each having a platinum working electrode set at a different potential. Two separate electropherograms were recorded and current ratios were generated based on the cu...
متن کاملRapid Biomolecule Analysis Using Two-dimensional Electrophoresis-electrospray Ionization Microchip
We demonstrate a two-dimensional (2D) separation microchip allowing capillary isoelectric focusing-capillary zone electrophoresis (cIEF-CZE) to be coupled to electrospray ionization mass spectrometry (ESI/MS). In the first dimension, separation is according to pI values (cIEF), while CZE occurs in the second dimension during mobilization towards the monolithically integrated ESI emitter. The se...
متن کاملChip-based microfluidic devices coupled with electrospray ionization-mass spectrometry.
We present the current status of the development of microfluidic devices fabricated on different substrates for coupling with electrospray ionization-mass spectrometry (ESI-MS). Until now, much success has been gained in fabricating the ESI chips, which show better performances due to miniaturization when compared with traditional methods. Integration of multiple steps for sample preparation an...
متن کاملIn-spray supercharging of peptides and proteins in electrospray ionization mass spectrometry.
Enhanced charging, or supercharging, of analytes in electrospray ionization mass spectrometry (ESI MS) facilitates high resolution MS by reducing an ion mass-to-charge (m/z) ratio, increasing tandem mass spectrometry (MS/MS) efficiency. ESI MS supercharging is usually achieved by adding a supercharging reagent to the electrospray solution. Addition of these supercharging reagents to the mobile ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Journal of the American Society for Mass Spectrometry
دوره 24 3 شماره
صفحات -
تاریخ انتشار 2013