ION TRAP-BASED APPARATUS AND METHOD FOR ANALYZING AND DETECTING BIPOLAR ION

摘要

An ion trap-based device and method for analyzing and detecting bipolar ions is provided. The device includes multiple electrodes of an ion trap; a radio frequency voltage source configured to form a radio frequency electric field; a direct current voltage source configured to form a bias electric field, positive and negative ions in the ion trap being separated by the bias electric field; a first and second detectors, configured to detect the positive and negative ions, respectively. A bipole and quadrupole field direct current voltage detection modes may be employed. A single positive ion or negative ion operation mode in a conventional biological mass spectrometry method is improved, so that the positive and negative ion modes are performed simultaneously; without any resolution loss, the analysis speed is increased, the sample consumption is reduced, and the accuracy of quantitative analysis of the samples is improved.

主权项

1. An ion trap-based device for analyzing and detecting bipolar ions, comprising:
an ion trap, the ion trap comprising multiple electrodes; a radio frequency voltage source (RF), configured to apply a radio frequency voltage (V) on the electrodes of the ion trap to form a radio frequency electric field; a direct current voltage source, configured to apply a direct current voltage (U) on different electrodes of the ion trap to form a bias electric field, positive ions and negative ions in the ion trap being separated under the effect of the bias electric field; a first detector, disposed outside electrodes of the ion trap for emitting the positive ions and configured to detect the positive ions; and a second detector, disposed outside electrodes of the ion trap for emitting the negative ion and configured to detect the negative ions.