Linfan Li

US Patent:

20210166927, Jun 3, 2021

Filed:

Jan 20, 2021

Appl. No.:

17/153156

Inventors:

- West Lafayette IN, US
Linfan Li - West Lafayette IN, US
Xiaoyu Zhou - West Lafayette IN, US

International Classification:

H01J 49/00
H01J 49/04

Abstract:

The invention generally relates to sample analysis with a miniature mass spectrometer. In certain embodiments, the invention provides methods that involve generating ions of a first analyte and ions of a second analyte. Those ions are transferred through a discontinuous sample introduction interface into a first ion trap of a mass spectrometer in a manner in which the discontinuous sample introduction interface remains open during the transferring. The discontinuous sample introduction interface is closed and the ions are sequentially transferred to a second ion trap of the mass spectrometer where they are sequentially analyzed.

US Patent:

20160181077, Jun 23, 2016

Filed:

Aug 6, 2014

Appl. No.:

14/909269

Inventors:

- West Lafayette IN, US
Linfan Li - West Lafayette IN, US
Xiaoyu Zhou - West Lafayette IN, US

International Classification:

H01J 49/00
H01J 49/04

Abstract:

The invention generally relates to sample analysis with a miniature mass spectrometer. In certain embodiments, the invention provides methods that involve generating ions of a first analyte and ions of a second analyte. Those ions are transferred through a discontinuous sample introduction interface into a first ion trap of a mass spectrometer in a manner in which the discontinuous sample introduction interface remains open during the transferring. The discontinuous sample introduction interface is closed and the ions are sequentially transferred to a second ion trap of the mass spectrometer where they are sequentially analyzed.

US Patent:

20150325423, Nov 12, 2015

Filed:

Jan 10, 2014

Appl. No.:

14/426591

Inventors:

- West Lafayette, IN
Yue Ren - West Lafayette IN, US
Jiangjiang Liu - West Lafayette IN, US
Linfan Li - West Lafayette IN, US

International Classification:

H01J 49/16
H01J 49/42
H01J 49/04

Abstract:

The invention generally relates to systems for analyzing a sample and methods of use thereof. In certain aspects, the invention provides systems that include an ionization probe and a mass analyzer. The probe includes a hollow body that has a distal tip. The probe also includes a substrate that is at least partially disposed within the body and positioned prior to the distal tip so that sample extracted from the substrate flows into the body prior to exiting the distal tip. The probe also includes an electrode that operably interacts with sample extracted from the substrate.