Method of improving a mass spectrometer, module for improving a mass spectrometer and an improved mass spectrometer

Patent metadata

Field	Value
Publication number	US-11515133-B2
Application number	US-202017022245-A
Country	US
Kind code	B2
Filing date	Sep 16, 2020
Priority date	Sep 16, 2020
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

The present invention relates to a method of improving a mass spectrometer, a module for improving a mass spectrometer and an improved mass spectrometer. The aforementioned method employs a calibration correction module that calibrates the mass spectrometer so timely, more precise and accurate data can be obtained. In particular, real time, accurate mass determinations of low analyte quantity samples can be obtained.

First claim

What is claimed is:

1. A mass spectrometer comprising a correction module, said correction module comprising an input/output controller, a random access memory unit, a hard drive memory unit, and a unifying computer bus system, said input/output controller being configured to receive a digital signal and transmit said signal to said central processing unit and retrieve a signal comprising the accurate measurand from said central processing unit, said correction module programmed to:
a) take sensor responses for known quantities of one or more isotopes of a particular compound of interest and estimate the quantity of the compound of interest in a sample, by calculating the average of the relative response factors of the known quantities as an estimate of the relative response factor of the compound of interest; using the following equation,

∑

i
=
1

n

⁢

y
i

x
i

n

≅

x
0

,

 wherein
x 0 is the quantity of compound of interest;
n=the total number of measurements taken in an analytic run;
x i =the true amount of the ith isotope from an analytic run; and
y i =the ith sensor response value from an analytic run;

 then
b) take sensor responses for known quantities of one or more isotopes of a particular compound of interest and estimate the quantity of the compound of interest in a sample, by calculating the values a and b which make the equation ay+b≅x true for all (x, y) pairs where x is the quantity of an isotope of the compound of interest included in the sample, and y is the sensor response for that same isotope; and/or
c) use an intercept obtained during a previous analytic run combined with sensor responses for at least one known quantity of an isotope of a compound of interest to estimate the value of an unknown quantity of a compound of interest contained on the same sample, by using the equation ay+b=x to estimate a, where b is known from the previous analytic run, y is the sensor response for the known quantity of the isotope of the compound of interest, and x is the quantity of the isotope of the compound of interest by substituting for y the sensor response for the compound of interest into the equation ay+b thereby providing an estimate for the quantity of the compound of interest.

2. The mass spectrometer according to claim 1 comprising a computer, said computer comprising said correction module.

Assignees

• Us Gov Air Force
• Us Air Force

Inventors

• Rubenstein Mitchell H
• Qualley Anthony V
• Clapp Benjamin A

Classifications

• H01J49/0036

  Step by step routines describing the handling of the data generated during a measurement · CPC title

• H01J49/0009 Primary

  Calibration of the apparatus · CPC title