METHOD FOR STORING AND REACTING IONS IN A MASS SPECTROMETER
First Claim
1. A method of analyzing ions with a mass spectrometer, the method comprising:
- a. providing a first ion guide having a first end and a second end;
b. introducing a first group of ions and a second group of ions into the first ion guide, the second group of ions being opposite in polarity to the first group of ions;
c. applying an RF voltage potential to the first ion guide for confining the first group of ions and the second group of ions radially within the first ion guide;
d. providing a trapping barrier to the second end of the first ion guide for trapping the first group of ions within the first ion guide;
e. providing an axial field for pushing the first group of ions toward the trapping barrier.
10 Assignments
0 Petitions
Accused Products
Abstract
A method of analyzing ions is provided having a first ion guide with first and second ends and introducing a first group of ions and a second group of ions of opposite polarity into the first ion guide, and applying an RF voltage potential to the first ion guide for confining the first and second groups of ions radially within the first ion guide. A first trapping barrier is provided to the first end of the first ion guide for trapping the first group of ions within the first ion guide and a second trapping barrier is provided to the second end of the first ion guide for trapping the second group of ions within the first ion guide and an axial field is provided for pushing the first group of ions toward the first trapping barrier and pushing the second group of ions toward the second trapping barrier.
-
Citations
49 Claims
-
1. A method of analyzing ions with a mass spectrometer, the method comprising:
-
a. providing a first ion guide having a first end and a second end;
b. introducing a first group of ions and a second group of ions into the first ion guide, the second group of ions being opposite in polarity to the first group of ions;
c. applying an RF voltage potential to the first ion guide for confining the first group of ions and the second group of ions radially within the first ion guide;
d. providing a trapping barrier to the second end of the first ion guide for trapping the first group of ions within the first ion guide;
e. providing an axial field for pushing the first group of ions toward the trapping barrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A method of analyzing ions with a mass spectrometer, the method comprising:
-
a. providing a first ion guide having a first end and a second end;
b. introducing a first group of ions and a second group of ions into the first ion guide, the second group of ions being opposite in polarity to the first group of ions;
c. applying an RF voltage potential to the first ion guide for confining the first group of ions and the second group of ions radially within the first ion guide;
d. providing a first trapping barrier to the first end of the first ion guide for trapping the first group of ions within the first ion guide; and
e. providing a second trapping barrier to the second end of the first ion guide for trapping the second group of ions within the first ion guide; and
f. providing an axial field for pushing the first group of ions toward the first trapping barrier and pushing the second group of ions toward the second trapping barrier. - View Dependent Claims (20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
-
41. A method of analyzing ions with a mass spectrometer, the method comprising:
-
a. providing a first ion guide having a first end and a second end;
b. introducing a first group of ions and a second group of ions into the first ion guide, the second group of ions being opposite in polarity to the first group of ions;
c. applying an RF voltage potential to the first ion guide for confining the first group of ions and the second group of ions radially within the first ion guide; and
d. providing more than one trapping regions within the first ion guide for trapping the first and second groups of ions to be trapped in separate regions of the ion guide. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48)
-
-
49. A method of trapping ions of opposite polarity within an ion guide comprising providing an axial field within the ion guide and alternating the direction of the axial field in time with a period that is less than the drift time of the ions that are desired to be trapped from one end of the ion guide to the other end so that most of the ions remain trapped.
Specification