نتایج جستجو برای: mass spectrometer source
تعداد نتایج: 885953 فیلتر نتایج به سال:
This work describes a new method for the correction of signal drift of a MS-based sensor by standard gas addition (SGA). It consists of introducing a gaseous He-Xe mixture continuously and independently of the carrier gas into the mass spectrometer source. To mimic the disturbances generated by periodical tuning of the mass detector, three series of adjustments were made to the main acquisition...
Two miniature mass spectrometer systems based on a microengineered quadrupole mass filter have been developed. One of the instruments has a footprint of 27 cm x 20 cm and is intended for laboratory use when space is at a premium. The other is portable and intended for use in the field. It is battery powered, weighs 14.9 kg, and is housed in a rugged case. This is the first example of a portable...
Protein Prospector is a suite of tools to interrogate genomic databases that is freely available via the UCSF Mass Spectrometry Facility website. Since its inception in 1995 it has continually improved in both breadth and functionality. Here we document enhancements and additions to the next public release and we describe current research on the development of several new tools. It is a selecti...
At the Low-Energy-Branch (LEB) of the Super-FRS at FAIR, precision measurements of very short-lived nuclei will be performed. For these experiments (MATS, LASPEC), the nuclei have to be stopped, cooled, separated and measured as fast and efficiently as possible. To achieve this goal, a multi-purpose, non-scanning mass spectrometer with single-ion sensitivity, a multiple-reflection timeof-flight...
A commercially available ion mobility spectrometer was interfaced to a custom-built linear time-of-flight (TOF) mass spectrometer for the purpose of examining electrospray-generated plumes. Ionic species that were separated in the ion mobility spectrometer could be selectively determined with the TOF mass spectrometer. Tetraalkylammonium salts, a peptide, and proteins were examined. Their ion m...
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