Development of Resistive Glass Multi-Capillary Inlet Tubes for Enhanced Ion Transport

摘要

Resistive glass tubes have been used successfully as reflectrons in TOF mass spectrometers and ion drift tubes in ion mobility spectrometers. This novel technology later enabled the exceptional performance of single capillary inlet tubes for ion transmission in atmospheric pressure ionization sources. Uniform electric fields which guide sample ions are generated within the robust, single-piece glass tubes. An improvement in ion transfer efficiency by a factor of 100 compared to quartz inlet tubes has been reported. To further increase ion transmission, multi-capillary inlet tubes of resistive glass have been developed. These tubes have a circular array of six channels for the same outer diameter. Unique extrusion and drawing processes used to create these multichannel tubes will be described and illustrated.