Study of a micro chamber quadrupole mass spectrometer

Wang, Jinchan; Zhang, Xiaobing; Mao, Fuming; Xiao, Mao; Cui, Yunkang; Engelsen, Daniel den; Lei, Wei

doi:10.1116/1.2827512

Cited by 8 publications

(4 citation statements)

References 15 publications

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“…Over the last few years, compact mass spectrometers have achieved great progress. For example, there are many different operational principle mass spectrometers at present, including ion traps, quadrupoles, time-of-flight and magnetic sector mass spectro meters [6][7][8][9]. However, the magnetic sector mass spectro meter has been widely studied due to its simple structure, good qualitative capability, insensitivity to pollution, high mass resolution and minimal electromagnetic interference with other instruments and systems [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Newly developed compact magnetic sector mass spectrometer

Dong¹,

Cheng²,

Sun³

et al. 2017

Meas. Sci. Technol.

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In this paper, a novel compact magnetic sector mass spectrometer has been developed and tested at the Lanzhou Institute of Physics. Its design is based on the mass separation of a 90° magnetic sector-field analyzer with a double trajectory, which has a magnetic induction of 0.7 T. The instrument can record mass range from 1 to 50 amu based on two special trajectories when the accelerating voltage of the ion source changes from 200 V to 2500 V. The dimensions of the device together with the electronic unit are approximately 220 × 165 × 165 mm3 (length × depth × height). The weight is 10.2 kg and the maximum power consumption was measured to be 20 W. The instrument successfully provided mass spectrum information on the vacuum test chamber, resolving power of about 58 at full width half maximum (FWHM), and demonstrated a sensitivity of 7.2 × 10−5 A Pa−1. The compact magnetic sector mass spectrometer is designed for space application and can be extended to other portable analytical fields on Earth.

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Section: Introductionmentioning

confidence: 99%

Newly developed compact magnetic sector mass spectrometer

Dong¹,

Cheng²,

Sun³

et al. 2017

Meas. Sci. Technol.

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“…In particular, the mass analyzer has been the focus of numerous miniaturization efforts. Many researchers have focused on scaling down the Paul ion trap [5], [6], the cylindrical ion trap (CIT) [7]- [10], the quadrupole [11]- [16], the timeof-flight (TOF) [17]- [19], and the magnetic sector instruments [20], [21]. There has also been interesting developments with toroidal ion traps [22], halo ion traps [23], [24], rectilinear ion traps (RITs) [25], [26], and even fully functional systems [27]- [30].…”

mentioning

confidence: 99%

Chip-Scale Quadrupole Mass Filters for Portable Mass Spectrometry

Cheung

Velásquez–García

Akinwande

2010

J. Microelectromech. Syst.

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We report the design, fabrication, and characterization of a new class of chip-scale quadrupole mass filter (QMF). The devices are completely batch fabricated using a wafer-scale process that integrates the quadrupole electrodes, ion optics, and housing into a single monolithic block. This process eliminates the electrode-to-housing misalignments inherent in other QMFs and enables the implementation of complex device architectures. To achieve the reported integration, 1 mm × 1 mm square electrodes of heavily doped silicon were utilized, resulting in quadrupoles with an effective aperture radius of 0.707 mm and a length of 30 mm. Mass filtering was demonstrated with this unconventional device showing a mass range of 650 amu and a resolution of ∼30 at a drive frequency of 1.8 MHz. When operated in the second stability region at 2.0 MHz and a mass range of 50 amu, a peak width of 0.3 amu was achieved at mass 28, showing a resolution of ∼90. This paper introduces operation in the second stability region as a reliable method for turning QMFs with less than ideal electrode geometries into high-performance devices. [2009-0325] Index Terms-Chip-scale quadrupole, mass filter, second stability region, square electrodes. I. INTRODUCTION M ASS spectrometers are powerful analytical instruments that have a wide range of applications spanning national security, environmental monitoring, space exploration, industrial processing, healthcare, and many others. In recent years, there has been a growing desire to take these useful tools into space and into the field to perform analyses in harsh environments. To achieve this migration, mass spectrometers need to be small, light, mechanically and thermally robust, and low powered. Miniaturization addresses most of these requirements by achieving portability from the reduction of size and weight. Additionally, the smaller devices will enable operation at higher pressures, relaxing the need for large, heavy, and power-hungry vacuum pumps [1]-[4]. The four major components of a mass spectrometer are the ionizer, the mass analyzer, the detector, and the vacuum pump.

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“…With the development of miniature mass analyzers, such as quadrupole mass filters, − ion traps, − and time-of-flight analyzers, portability of mass spectrometer systems used for MIMS has also been achieved, , which is important for field applications such as OiW monitoring. This is because smaller analyzers can operate at higher pressures, requiring less robust and less expensive vacuum systems that consume less power and allow battery operation.…”

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confidence: 99%

Oil-in-Water Monitoring Using Membrane Inlet Mass Spectrometry

Brkić

Taylor

2011

Anal. Chem.

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A membrane inlet mass spectrometry (MIMS) system has been used for detection and analysis of two types of North Sea crude oil. The system was installed on-field on the Flotta Oil Terminal (Orkney, UK). It consisted of a quadrupole mass spectrometer (QMS) connected to the capillary probe with a silicone-based membrane. The produced mass spectra and calibration plots from the MIMS instrument showed the capability to measure levels of individual hydrocarbons within crude oil in seawater. The generated mass spectra from the field tests also showed the ability to distinguish between different types of oil and to determine concentrations of toxic hydrocarbons in oil (e.g., benzene, toluene, and xylene (BTX)). The performance of the instrument at different temperatures of seawater and oil droplet sizes was also investigated. The results showed that the QMS-based MIMS system has a potential to complement existing oil-in-water (OiW) monitors by being able to detect different oil types and specific hydrocarbon concentrations with high accuracy, which are currently not supported in commercially available OiW monitors.

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Study of a micro chamber quadrupole mass spectrometer

Cited by 8 publications

References 15 publications

Newly developed compact magnetic sector mass spectrometer

Newly developed compact magnetic sector mass spectrometer

Chip-Scale Quadrupole Mass Filters for Portable Mass Spectrometry

Oil-in-Water Monitoring Using Membrane Inlet Mass Spectrometry

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