Search Results - "Chan, George C.Y."

Highly Sensitive Determination of Arsenic and Antimony Based on an Interrupted Gas Flow Atmospheric Pressure Glow Discharge Excitation Source by Yang, Chun, Chan, George C.-Y, He, Dong, Liu, Zhifu, Deng, Qisi, Zheng, Hongtao, Hu, Shenghong, Zhu, Zhenli

“…A novel interrupted gas flow (IF) technique has been proposed for highly sensitive determination of ultratrace levels of arsenic and antimony in water samples…”
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Halo-Shaped Flowing Atmospheric Pressure Afterglow: A Heavenly Design for Simplified Sample Introduction and Improved Ionization in Ambient Mass Spectrometry by Pfeuffer, Kevin P, Schaper, J. Niklas, Shelley, Jacob T, Ray, Steven J, Chan, George C.-Y, Bings, Nicolas H, Hieftje, Gary M

“…The flowing atmospheric-pressure afterglow (FAPA) is a promising new source for atmospheric-pressure, ambient desorption/ionization mass spectrometry. However,…”
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Characterization and Optimization of a Spectral Window for Direct Gaseous Uranium Hexafluoride Enrichment Assay Using Laser-Induced Breakdown Spectroscopy by Chan, George C. Y., Martin, Leigh R., Russo, Richard E.

“…Through a systematic scanning of 235U and 238U emission lines between 280 nm and 745 nm, the optimal emission line for direct gaseous uranium hexafluoride…”
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Isotopic analysis of uranium at the picogram level with single-shot laser induced breakdown spectroscopy by Russo, Richard E., González, Jhanis J., Oropeza, Dayana, Liu, Chunyi, Chirinos, José, Chan, George C.-Y.

“…Uranium was measured by laser induced breakdown spectroscopy (LIBS) with a limit of detection of 1.3 picograms with spectral-peak height as the analytical…”
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Temporal characterization of fundamental plasma parameters in pulsed liquid electrode plasma (LEP) optical emission spectrometry by Zhu, Yanbei, Russo, Richard E., Chan, George C.-Y.

“…The fundamental characteristics of liquid electrode plasma (LEP), a pulsed plasma source for optical emission spectrometry, were investigated. Two distinct…”
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Analytical characterization of laser induced plasmas towards uranium isotopic analysis in gaseous uranium hexafluoride by Chan, George C.-Y., Martin, Leigh R., Trowbridge, Lee D., Zhu, Zhenli, Mao, Xianglei, Russo, Richard E.

“…To perform direct enrichment assay on gaseous uranium hexafluoride (UF6) with laser induced breakdown spectroscopy (LIBS), the dominant spectral-line features,…”
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Effect of hydrogen isotope on plasma impedance and thermal pinching induced by single aerosol droplets injected into an inductively coupled plasma by Chan, George C.-Y., Hieftje, Gary M.

“…The mass of the hydrogen isotope in micrometer-sized aqueous droplets introduced into an ICP has been found to affect the degree of resulting plasma…”
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Use of a Solution Cathode Glow Discharge for Cold Vapor Generation of Mercury with Determination by ICP-Atomic Emission Spectrometry by Zhu, Zhenli, Chan, George C.-Y, Ray, Steven J, Zhang, Xinrong, Hieftje, Gary M

“…A novel vapor-generation technique is described for mercury determination in aqueous solutions. Without need for a chemical reducing agent, dissolved mercury…”
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Characterization of a Low-Temperature Plasma (LTP) Ambient Ionization Source Using Temporally Resolved Monochromatic Imaging Spectrometry by Chan, George C.-Y., Engelhard, Carsten, Wiley, Joshua S., Shoulds, Ayanna U., Cooks, R. Graham, Hieftje, Gary M., Shelley, Jacob T.

“…The low-temperature plasma (LTP) probe is a common plasma-based source used for ambient desorption–ionization mass spectrometry (MS). While the LTP probe has…”
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Calcium fluoride as a dominating matrix for quantitative analysis by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS): A feasibility study by Zhu, Yanbei, Gonzalez, Jhanis J., Yang, Xinyan, Chan, George C.-Y., He, Xin, Kostecki, Robert, Mao, Xianglei, Russo, Richard E., Zorba, Vassilia

“…Calcium fluoride formed by the reaction between ammonium bifluoride and calcium chloride was investigated as a dominating matrix for quantitative analysis by…”
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Elucidation of C2 and CN formation mechanisms in laser-induced plasmas through correlation analysis of carbon isotopic ratio by Dong, Meirong, Chan, George C.-Y., Mao, Xianglei, Gonzalez, Jhanis J., Lu, Jidong, Russo, Richard E.

“…Laser ablation molecular isotopic spectrometry (LAMIS) was recently reported for rapid isotopic analysis by measuring molecular emission from laser-induced…”
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Direct uranium enrichment assay in gaseous uranium hexafluoride with laser induced breakdown spectroscopy by Chan, George C.-Y., Mao, Xianglei, Martin, Leigh R., Trowbridge, Lee D., Russo, Richard E.

“…A set of eleven U atomic emission lines, between 421.099 and 421.460 nm, were characterized for direct enrichment assay of gaseous UF 6 samples with laser…”
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Tunable Ionization Modes of a Flowing Atmospheric-Pressure Afterglow (FAPA) Ambient Ionization Source by Badal, Sunil P, Michalak, Shawn D, Chan, George C.-Y, You, Yi, Shelley, Jacob T

“…Plasma-based ambient desorption/ionization sources are versatile in that they enable direct ionization of gaseous samples as well as desorption/ionization of…”
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Optical and mass-spectral characterization of mixed-gas flowing atmospheric-pressure afterglow sources by Badal, Sunil P., Farnsworth, Paul B., Chan, George C.-Y., Molnar, Brian T., Hellinger, Jessica R., Shelley, Jacob T.

“…Plasma-based ambient desorption/ionization (ADI) sources for mass spectrometry (MS) often use helium as the primary discharge gas due to the large reaction…”
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Combination of atomic lines and molecular bands for uranium optical isotopic analysis in laser induced plasma spectrometry by Mao, Xianglei, Chan, George C.-Y., Choi, Inhee, Zorba, Vassilia, Russo, Richard E.

“…Through computer simulation on experimentally acquired optical spectra, uranium isotopic analysis by laser ablation molecular isotopic spectrometry and laser…”
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Femtosecond filament-laser ablation molecular isotopic spectrometry by Hou, Huaming, Chan, George C.-Y., Mao, Xianglei, Zheng, Ronger, Zorba, Vassilia, Russo, Richard E.

“…A new remote sensing technology for real-time isotopic analysis is introduced: Femtosecond Filament-Induced Laser Ablation Molecular Isotopic Spectrometry…”
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Elucidation of Reaction Mechanisms Responsible for Afterglow and Reagent-Ion Formation in the Low-Temperature Plasma Probe Ambient Ionization Source by Chan, George C.-Y, Shelley, Jacob T, Wiley, Joshua S, Engelhard, Carsten, Jackson, Ayanna U, Cooks, R. Graham, Hieftje, Gary M

“…The development of ambient desorption/ionization mass spectrometry has shown promising applicability for the direct analysis of complex samples in the open,…”
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Cell design for laser-induced breakdown spectroscopy measurements on reactive gas samples by Peruski, Kathryn M., Davis, Tara A., Chan, George C.-Y., Mao, Xianglei, Trowbridge, Lee, Martin, Leigh R.

“…•Cell to hold UF6(g) for LIBS measurements designed and constructed.•Cell has potential application for other reactive gasses.•Materials of construction shown…”
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Multivariate nonlinear spectral fitting for uranium isotopic analysis with laser-induced breakdown spectroscopy by Song, Jiaojian, Chan, George C.-Y., Mao, Xianglei, Woodward, Jonathan D., Smithwick, Robert W., Schaaff, T. Gregory, Stowe, Ashley C., Harris, Candace D., Zheng, Ronger, Zorba, Vassilia, Russo, Richard E.

“…The analytical characteristics of U isotopic analysis with laser-induced breakdown spectroscopy (LIBS) were investigated by analyzing a series of U3O8–Li2B4O7…”
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Femtosecond Laser Ablation Molecular Isotopic Spectrometry for Zirconium Isotope Analysis by Hou, Huaming, Chan, George C.-Y, Mao, Xianglei, Zorba, Vassilia, Zheng, Ronger, Russo, Richard E

“…Laser ablation molecular isotopic spectrometry (LAMIS) for rapid isotopic analysis of zirconium at atmospheric pressure was studied with a femtosecond-laser…”
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