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Anal Chem

Title:		Developing a Vacuum Electrospray Source To Implement Efficient Atmospheric Sampling for Miniature Ion Trap Mass Spectrometer
Author(s):		Yu Q; Zhang Q; Lu X; Qian X; Ni K; Wang X;
Address:		"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 Instrument, Tsinghua University , Beijing 100084, China"
Journal Title:		Anal Chem
Year:		2017
Volume:		20171114
Issue:		23
Page Number:		12938 - 12944
DOI:		10.1021/acs.analchem.7b03797
ISSN/ISBN:		1520-6882 (Electronic) 0003-2700 (Linking)
Abstract:		"The performance of a miniature mass spectrometer in atmospheric analysis is closely related to the design of its sampling system. In this study, a simplified vacuum electrospray ionization (VESI) source was developed based on a combination of several techniques, including the discontinuous atmospheric pressure interface, direct capillary sampling, and pneumatic-assisted electrospray. Pulsed air was used as a vital factor to facilitate the operation of electrospray ionization in the vacuum chamber. This VESI device can be used as an efficient atmospheric sampling interface when coupled with a miniature rectilinear ion trap (RIT) mass spectrometer. The developed VESI-RIT instrument enables regular ESI analysis of liquid, and its qualitative and quantitative capabilities have been characterized by using various solution samples. A limit of detection of 8 ppb could be attained for arginine in a methanol solution. In addition, extractive electrospray ionization of organic compounds can be implemented by using the same VESI device, as long as the gas analytes are injected with the pulsed auxiliary air. This methodology can extend the use of the proposed VESI technique to rapid and online analysis of gaseous and volatile samples"
Keywords:
Notes:		"PubMed-not-MEDLINEYu, Quan Zhang, Qian Lu, Xinqiong Qian, Xiang Ni, Kai Wang, Xiaohao eng Research Support, Non-U.S. Gov't 2017/11/02 Anal Chem. 2017 Dec 5; 89(23):12938-12944. doi: 10.1021/acs.analchem.7b03797. Epub 2017 Nov 14"