Quadrupole mass spectrometer data to enable new hardware operating regimes

Patent metadata

Field	Value
Publication number	US-12159776-B2
Application number	US-202217730642-A
Country	US
Kind code	B2
Filing date	Apr 27, 2022
Priority date	Apr 27, 2022
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

Disclosed herein are systems and methods for a mass spectrometer having a multipole configured to pass an ion stream, and a detector configured to detect the properties of the abundance of ions represented by data points. The mass spectrometer also includes a processing system that is configured to obtain a plurality of paired data points (e.g., detector data points and RF amplitude data points), and identify, based on centroiding a portion of the plurality of paired data points, at least one characteristic of a peak and determine, based on the at least one characteristic of the peak, a preferred peak shape.

First claim

What is claimed is:

1. A mass spectrometer support apparatus, comprising:
a processor;
a non-transitory computer readable medium storing instructions that cause the processor to perform a set of acts comprising:
obtaining, with a detector, detector data points based on ions from an ion source;
obtaining a plurality of paired data points comprising the detector data points and RF amplitude data points, each detector data point being paired with an RF amplitude data point;
identifying, based on centroiding a portion of the plurality of paired data points, at least one characteristic of a peak;
determining, based on the at least one characteristic of the peak, a preferred peak shape;
calculating, based on centroiding another portion of the plurality of paired data points, a change in peak shape; and
identifying, based on the plurality of paired data points and the change in peak shape, a plurality of accurate data pairs.

2. The mass spectrometer support apparatus of claim 1 , further comprising a digital RF closed loop control circuit, wherein the RF amplitude data points are obtained via the digital RF closed loop control circuit.

3. The mass spectrometer support apparatus of claim 1 , further comprising a digital RF measuring circuit, wherein the RF amplitude data points are obtained via the digital RF measuring circuit.

4. The mass spectrometer support apparatus of claim 1 , wherein the at least one characteristic of the peak comprises at least one of: a peak shape and a peak width.

5. The mass spectrometer support apparatus of claim 1 , wherein the instructions further cause the processor to:
determine, based on a calibration of the mass spectrometer support apparatus, a relationship between a measured RF amplitude and an ion of known mass.

6. The mass spectrometer support apparatus of claim 5 , wherein the instructions further cause the processor to create, based on the relationship between the measured RF amplitude and the ion of known mass calibration, a resolution-transmission curve.

7. The mass spectrometer support apparatus of claim 6 , wherein identifying the plurality of accurate data pairs is further based on the resolution-transmission curve.

8. The mass spectrometer support apparatus of claim 1 , wherein the instructions further cause the processor to:
obtain a plurality of DC amplitude data points, wherein each of the plurality of DC amplitude data points is paired with a corresponding RF amplitude data point.

9. The mass spectrometer support apparatus of claim 8 , wherein identifying at least one characteristic of a peak is further based on centroiding the plurality of DC amplitude data points.

10. The mass spectrometer support apparatus of claim 1 , wherein determining the preferred peak shape further comprises using at least one of: a circulant matrix, a convolution operation, or a least squares regression analysis.

11. A method comprising:
obtaining detector data points based on ions from an ion source;
obtaining a plurality of paired data points comprising the detector data points and RF amplitude data points, each detector data point being paired with an RF amplitude data point;
identifying, based on centroiding a portion of the plurality of paired data points, at least one characteristic of a peak;
determining, based on the at least one characteristic of the peak, a preferred peak shape; calculating, based on centroiding another portion of the plurality of paired data points, a change in peak shape; and
identifying, based on the plurality of paired data points and the change in peak shape, a plurality of accurate data pairs.

12. The method of claim 11 , further comprising a digital RF closed loop control circuit, wherein the RF amplitude data points are obtained via the digital RF closed loop control circuit.

13. The method of claim 11 , further comprising a digital RF measuring circuit, wherein the RF amplitude data points are obtained via the digital RF measuring circuit.

14. The method of claim 11 , wherein the at least one characteristic of the peak comprises at least one of: a peak shape and a peak width.

15. The method of claim 11 , further comprising determining, based on calibrating a mass spectrometer support apparatus, a correlation between a measured RF amplitude and an ion of known mass.

16. The method of claim 15 , further comprising creating, based on the correlation between the measured RF amplitude and the ion of known mass calibration, a resolution-transmission curve.

17. The method of claim 16 , wherein identifying the plurality of accurate data pairs is further based on the resolution-transmission curve.

18. The method of claim 11 , further comprising obtaining a plurality of DC amplitude data points, wherein each of the plurality of DC amplitude data points is paired with a corresponding RF amplitude data point.

19. The method of claim 18 , wherein identifying at least one characteristic of a peak is further based on centroiding the plurality of DC amplitude data points.

20. The method of claim 11 , wherein determining the preferred peak shape further comprises using at least one of: a circulant matrix, a convolution operation, or a least squares regression analysis.

21. A mass spectrometer support apparatus, comprising:
a multipole configured to pass an ion stream, the ion stream comprising an abundance of one or more ion species within stability boundaries defined by (a, q) values;
a detector configured to detect data points representing properties of the abundance of one or more ion species; and
a processing system configured to obtain a plurality of paired data points comprising detector data points and RF amplitude data points, each detector data point being paired with an RF amplitude data point, the processing system further configured to identify, based on centroiding a portion of the plurality of paired data points, at least one characteristic of a peak and determine, based on the at least one characteristic of the peak, a preferred peak shape, wherein the processing system is further configured to calculate, based on centroiding another portion of the plurality of paired data points, a change in peak shape and identify, based on the plurality of paired data points and the change in peak shape, a plurality of accurate data pairs.

22. The mass spectrometer support apparatus of claim 21 , further comprising an RF control circuit and wherein the RF amplitude data points are obtained via the RF control circuit.

23. The mass spectrometer support apparatus of claim 21 , wherein the at least one characteristic of the peak comprises at least one of: a peak shape and a peak width.

24. The mass spectrometer support apparatus of claim 21 , wherein the processing system is further configured to determine, based on a calibration of the mass spectrometer support apparatus, a correlation between a measured RF amplitude and an ion of known mass.

Assignees

• Thermo Finnigan Llc

Inventors

• Smith Johnathan W

Classifications

• H01J49/4215

  Quadrupole mass filters (H01J49/4225 takes precedence) · CPC title

• H01J49/0027

  Methods for using particle spectrometers · CPC title

• G06F2218/14

  by matching peak patterns · CPC title

• G06F2218/02

  Preprocessing · CPC title

• H01J49/4205

  Device types · CPC title