title: Experimental and simulation investigation of ion transfer in different sampling capillaries.
abstract: Atmospheric pressure interfaces were a fundamental structure for transferring air generated ions into the vacuum manifold of a mass spectrometer. This work is devoted to the characterization of ion transfer in metal capillaries through both experimental and simulated investigations. The impact of capillary configurations on ion transmission efficiency was evaluated using an electrospray mass spectrometer with various bent capillaries as the transfer devices. In addition, a numerical model has been set up by coupling the SIMION 8.0 and the computational flow dynamics for simulation study of ion migration in the complex atmospheric system. The transfer efficiency was found to be highly affected by the variation in electric field and the capillary geometry, revealing that the hydrodynamic and electric force were both dominant and interactional during the transmission process. The consistency of the results from the experimental analysis and simulation modeling proved the validity of the model, which was helpful for understanding ion activity in transfer capillaries.
authors.affiliation: Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
authors.forename: Quan
authors.initials: Q
authors.lastname: Yu
authors.affiliation: Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.affiliation: Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Ni
authors.affiliation: Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Qian
authors.affiliation: State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, 100084, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Tang
authors.affiliation: Division of Advanced Manufacturing, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China.|State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, 100084, China.
authors.forename: Xiaohao
authors.initials: X
authors.lastname: Wang
keywords: atmospheric pressure; gas flow; ion transfer; sampling capillary; simulation modeling