ION MIGRATION RATE ANALYSIS DEVICE AND ANALYSIS METHOD APPLIED

摘要

The present invention provides an ion mobility analyzer apparatus and analysis method. The analyzer apparatus includes: an ion source; two groups of parallel electrodes, wherein a drift region is formed between the two groups of parallel electrodes, the drift region has an ion entrance and an ion exit, and the ion entrance is connected to the ion source; wherein each of the two groups of parallel electrodes is located in a plane respectively, the two planes are parallel to each other, the gas flow is a laminar flow; a power supply unit, configured to apply direct current potentials on the two groups of parallel electrodes to form a direct current electric field that applies an opposing force on ions against the gas flow so that ions with different mobilities are trapped under the combined effect of the gas flow and the direct current electric field, wherein the power supply unit scans the direct current electric field to separate ions with different mobilities in the drift region and adds radio frequency voltages on the parallel electrodes to confine ions in a direction perpendicular to the direction of the gas flow; and a detector connected to the ion exit to detect ions. The analyzer apparatus consistent with the present invention achieves high sensitivity and ion utilization, and can measure ion mobility accurately.