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Electrospray ionization interface to high pressure mass spectrometry and related methods

專(zhuān)利號(hào)
US10867781B2
公開(kāi)日期
2020-12-15
申請(qǐng)人
The University of North Carolina at Chapel Hill（US NC Chapel Hill）
發(fā)明人
John Michael Ramsey; William McKay Gilliland, Jr.
IPC分類(lèi)
H01J49/16; H01J49/24; H01J49/00; H01J49/04; B01L3/00
技術(shù)領(lǐng)域
mass,esi,analyzer,about,mm,inlet,chamber,ion,vacuum,trap
地域： NC NC Chapel Hill

摘要

An electrospray ionization (ESI)-mass spectrometer analysis systems include an ESI device with at least one emitter configured to electrospray ions and a mass spectrometer in fluid communication with the at least one emitter of the ESI device. The mass spectrometer includes a mass analyzer held in a vacuum chamber. The vacuum chamber is configured to have a high (background/gas) pressure of about 50 mTorr or greater during operation. During operation, the ESI device is configured to either; (a) electrospray ions into a spatial region external to the vacuum chamber and at atmospheric pressure, the spatial extent being adjacent to an inlet device attached to the vacuum chamber, the inlet device intakes the electrosprayed ions external to the vacuum chamber with the mass analyzer and discharges the ions into the vacuum chamber with the mass analyzer; or (b) electrospray ions directly into the vacuum chamber with the mass analyzer.

說(shuō)明書(shū)

The mass spectrometer system 10 can be lightweight, typically between about 1-25 pounds (including a vacuum pump or pumps), and, optionally, batteries. The housing 10h holding the mass spectrometer system and ESI inlet device 15 can be configured as a handheld or benchtop housing. In some embodiments, a portable housing can have a form factor similar in size and weight as a Microsoft? Xbox?, Sony? PLAYSTATION? or Nintendo? Wii? game console or game controller, or similar to a form factor associated with an electronic notebook, PDA, IPAD or smartphone and may optionally have a pistol grip. However, other configurations of the housing may be used as well as other arrangements of the control circuit. The housing 10h typically holds a display screen 10d and can have a User Interface 10i such as a Graphic User Interface (“GUI”) (FIG. 10A).

The system 100 may also include a transceiver, GPS module and antenna and can be configured to communicate with a smartphone or other pervasive computing device (laptop, electronic notebook, PDA, IPAD, and the like) to transfer data or for control of operation, e.g., with a secure APP or other wireless programmable communication protocol.

In some embodiments, the mass spectrometer 100 is configured so that the ESI device 20 as the ion source transmits ions at atmospheric pressure to the inlet device 15 and the mass analyzer 30 and detector 40 operate at near isobaric conditions and at a pressure that is greater than 100 mTorr.

權(quán)利要求

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