Results 171 to 180 of about 931,183 (212)

Design and optimization of a corona discharge ionization source for ion mobility spectrometry

Review of Scientific Instruments, 2000
In this work the possibility of using corona discharge as an ionization source in ion mobility spectrometry has been investigated. The results for both positive and negative polarity in air are consistent with the Townsend formula which states that I/V is a linear function of V. The distribution profile of the corona ions has also been investigated and
M. Tabrizchi, T. Khayamian, N. Taj
exaly   +2 more sources

Corona discharge ionization of paracetamol molecule: Peak assignment

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015
Ionization of paracetamol was investigated using ion mobility spectrometry equipped with a corona discharge ionization source. The measurements were performed in the positive ion mode and three peaks were observed in the ion mobility spectrum. Experimental evidence and theoretical calculations were used to correlate the peaks to related ionic species ...
H, Bahrami, H, Farrokhpour
openaire   +2 more sources

Coupling corona discharge for ambient extractive ionization mass spectrometry

The Analyst, 2011
Unlike the extractive electrospray ionization (EESI) technique described elsewhere, a corona discharge instead of electrospray ionization has been utilized to charge a neutral solvent spray under ambient conditions for the generation of highly charged microdroplets, which impact a neutral sample plume for the extractive ionization of the analytes in ...
Bin, Hu, Xinglei, Zhang, Ming, Li, Xuejiao, Peng, Jing, Han, Shuiping, Yang, Yongzhong, Ouyang, Huanwen, Chen   +7 more
openaire   +2 more sources

Absorption of Photo‐Ionizing Radiation of Corona Discharges in Air

Plasma Processes and Polymers, 2008
AbstractThe absorption characteristics of photo‐ionizing VUV radiation emitted by corona discharges in the pressure range from 20 to 750 Torr in dry and humid air were measured. The experimental results are compared with data and approximation formulae obtained by others. For a wide region of pressure and absorption path length, the formula proposed by
Märt Aints, Ants Haljaste, Toomas Plank, Leho Roots   +3 more
openaire   +1 more source

Basic characteristics of self‐control corona discharge air ionizer

IEEJ Transactions on Electrical and Electronic Engineering, 2016
We propose a self‐controlling corona discharge air ionizer for the static neutralization of electronic products in manufacturing processes. This air ionizer automatically generates only the quantity of ions required to neutralize a charged product, without the need for a control system.
Takashi Sato, Takashi Ikehata, Takashi Terashige, Kazuo Okano   +3 more
openaire   +1 more source

Experimental Studies on Corona Discharge Ionization

IOSR Journal of Applied Physics, 2013
This study investigates the possibility of corona discharge ionization technique for reduction of fog. For corona discharge ionization a high voltage power supply is designed and developed indigenously. The high output voltage is developed by using isolation transformer, autotransformer, and high voltage neon transformer and it is converted into DC ...
openaire   +1 more source

Experimental study of the ionization of flowing gases by DC corona-discharge

32nd AIAA Plasmadynamics and Lasers Conference, 2001
In this paper the authors have focused on characterizing a DC corona ionization device. The device is composed of a flat-plate aluminum anode, and a Re-W cylindrical cathode filament. A stable plasma is created by gas breakdown in a radial-axially symmetrical electric field generated by a high voltage DC power supply.
Stelu Deaconu, Hugh Coleman, S. Wu
openaire   +1 more source

Experimental and theoretical investigation of para-aminophenol ionization in corona discharge

Journal of Molecular Structure, 2015
Abstract Ionization of para-aminophenol was investigated using an ion mobility spectrometer equipped with a corona discharge as ionization source. The experimental results were confirmed with the use of theoretical method, based on density functional theory.
H. Bahrami, H. Salehabadi
openaire   +1 more source

Alternating current corona discharge/atmospheric pressure chemical ionization for mass spectrometry

Rapid Communications in Mass Spectrometry, 2013
RATIONALE Although alternating current (ac) corona discharge has been widely used in the fields of material science and technology, no reports have been published on its application to an atmospheric pressure chemical ionization (APCI) ion source. In this work, ac corona discharge for an APCI ion source has been
Ahsan, Habib, Dilshadbek, Usmanov, Satoshi, Ninomiya, Lee Chuin, Chen, Kenzo, Hiraoka   +4 more
openaire   +2 more sources

A unipolar corona discharge microfabricated ionizer structure for gases at atmospheric pressure and composition

17th IEEE International Conference on Micro Electro Mechanical Systems. Maastricht MEMS 2004 Technical Digest, 2004
To miniaturize airborne participates sizing and counting apparatus for ubiquitous deployment in air quality monitoring and epidemiological studies, we developed a unipolar corona discharge microfabricated ionizer structure for gases at atmospheric pressure and composition.
Tien, NC, McCormick, DT, Chua, BL, Holmen, B, Wexler, AS, Shih, WP, Li, Z, Niemeier, DA   +7 more
openaire   +2 more sources