Gas Delivery System For Mass Spectrometer Reaction And Collision Cells
AssigneeDH Technologies Development Pte. Ltd.
InventorsHamid R. Badiei, Kaveh Kahen
Life of this patent
Estimating the term…
Abstract
A gas delivery system for a cell-based mass spectrometer includes a mass flow controller having an input coupled to a gas source. A three-way valve includes an input coupled to an output of the mass flow controller, a first output coupled to a vacuum system, and a second output normally coupled to a reaction or collision cell. A cell is positioned inside a vacuum chamber of the mass spectrometer where the second output of the three-way valve is coupled to an inlet of the cell and the mass flow controller provides a gas to the cell that increases a pressure inside the cell relative to the pressure in the vacuum chamber.
Claims23
A gas delivery system for a cell-based mass spectrometer, the gas delivery system comprising:
- a. a mass flow controller having an input coupled to a gas source;
- b. a three-way valve having an input coupled to an output of the mass flow controller, a first output coupled to a vacuum system, and a second output;
- and
- c. a cell positioned inside a vacuum chamber of a mass spectrometer, the second output of the three-way valve being coupled to an inlet of the cell, the mass flow controller providing a gas to the cell that increases a pressure inside the cell relative to the pressure in the vacuum chamber.
A gas delivery system for a cell-based mass spectrometer, the gas delivery system comprising:
- a. a plurality of mass flow controllers, each of the plurality of mass flow controllers having an input coupled to an output of a respective one of a plurality of gas sources;
- b. a plurality of three-way valves, each of the plurality of three-way valves having an input that is coupled to an output of a respective one of the plurality of mass flow controllers, a first output of each of the plurality of three-way valves being coupled to a vacuum system;
- and
- c. a cell positioned inside a vacuum chamber of a mass spectrometer, a second output of each of the plurality of three-way valves being coupled to an inlet of the cell, at least one of the plurality of mass flow controllers providing a gas to the cell that increases a pressure inside the cell relative to the pressure in the vacuum chamber.
A method for delivering gas to a cell-based mass spectrometer, the method comprising:
- a. providing a gas to a mass flow controller;
- b. evacuating the gas from an output of the mass flow controller;
- and
- c. metering the gas with the mass flow controller and directing the metered gas to a cell inside a mass spectrometer.
Dependencies are inferred from the claim text.