4.8 Article

Rapid Characterization of Complex Viscous Liquids at the Molecular Level

Journal

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 48, Issue 44, Pages 8277-8280

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.200902360

Keywords

complex matrices; high-throughput analysis; ionic liquids; mass spectrometry; viscous liquids

Funding

  1. ETH Fellowship
  2. Eidgenossische Stipendienkommission for auslandische Studierende (ESKAS)
  3. MOST [2009 DFA41880]

Ask authors/readers for more resources

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

Review Spectroscopy

Recent advances in surface elemental mapping via glow discharge atomic spectrometry

Gerardo Gamez, Kevin Finch

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY (2018)

Article Chemistry, Analytical

Geometric super-resolution on push-broom hyperspectral imaging for plasma optical emission spectroscopy

Songyue Shi, Xiaoxia Gong, Yan Mu, Kevin Finch, Gerardo Gamez

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY (2018)

Article Biochemical Research Methods

Low-Temperature Plasma Probe Mass Spectrometry for Analytes Separated on Thin-Layer Chromatography Plates: Direct vs Laser Assisted Desorption

Xiaoxia Gong, Dong Zhang, Inah B. Embile, Yue She, Songyue Shi, Gerardo Gamez

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY (2020)

Article Spectroscopy

Advances in Thomson scattering diagnostics of plasmas used for chemical analysis

Kevin Finch, Dong Zhang, Yue She, Aldo Hernandez, Gerardo Gamez

Summary: This review provides a brief explanation of the theory and experimental requirements of Thomson scattering, as well as highlights novel instrumentation advances and insights about chemical analysis plasmas discovered in recent TS publications that were previously not covered in other reviews.

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY (2021)

Article Chemistry, Analytical

Flowing atmospheric-pressure afterglow drift tube ion mobility spectrometry

Mohsen Latif, Dong Zhang, Gerardo Gamez

Summary: This work presents the coupling of FAPA with stand-alone DTIMS for the first time, overcoming opposing potentials at the interface to study the signal of selected analytes. The spectra obtained from FAPA-DTIMS agree with literature values, showing good quantitative characterization for the selected compounds.

ANALYTICA CHIMICA ACTA (2021)

Article Chemistry, Analytical

Instantaneous Differentiation of Functional Isomers via Reactive Flowing Atmospheric Pressure Afterglow Mass Spectrometry

Dong Zhang, Mohsen Latif, Gerardo Gamez

Summary: A novel reactive flowing atmospheric-pressure afterglow mass spectrometry source was developed for rapid isomer differentiation in real time, successfully distinguishing two functional isomers of valproic acid metabolites, and improving detection sensitivity for some larger analyte types.

ANALYTICAL CHEMISTRY (2021)

Article Chemistry, Analytical

Laser assisted sampling vs direct desorption flowing atmospheric pressure afterglow mass spectrometry of complex polymer samples: Forensic implications for pressure sensitive tape chemical analysis

Maureen Oliva, Dong Zhang, Paola Prada-Tiedemann, Gerardo Gamez

Summary: Flowing atmospheric pressure afterglow (FAPA) mass spectrometry is a cost-effective and potentially portable technique that allows direct desorption/ionization from samples with little-to-no sample preparation. Laser assisted sampling (LAS) is developed to address limitations with analytes of low desorption efficiency, extending the range of chemical information obtainable from polymer samples. The combination of direct desorption FAPA and LAS FAPA techniques provides a competitive advantage over conventional techniques in forensic applications.

TALANTA (2021)

Article Chemistry, Analytical

Three-Dimensional Mass Spectral Imaging of Polymers Via Laser-Assisted Micro-Pyrolysis Program with Flowing Atmospheric-Pressure Afterglow Ambient Mass Spectrometry

Dong Zhang, David Zeldes, Gerardo Gamez

Summary: In this study, a novel diode laser-assisted micro-pyrolysis program (LAMP) technique was demonstrated to profile polymers and polymer additives in real time. Laser power modulation allowed thermal separation of additives and different pyrolysis products, and real-time duty cycle changes enabled faster temperature control. MS imaging with lateral and depth resolution was also demonstrated.

ANALYTICAL CHEMISTRY (2022)

Article Chemistry, Analytical

High-throughput single pixel spectral imaging system for glow discharge optical emission spectrometry elemental mapping enabled by compressed sensing

Gerardo Gamez, Yue She, Paola Rivera, Songyue Shi, Kevin Finch

Summary: A single-pixel spectral imaging system based on compressed sensing image sampling was developed and optimized for coupling with glow discharge optical emission spectroscopy elemental mapping. The system achieved high spatial fidelity and fast measurement times by using specific matrix density and compression factor. Through optimizing the sparsifying basis and reconstruction algorithm, the accuracy of background equivalent concentration was improved. The system was successfully demonstrated in the elemental mapping of a flexible, etched-copper circuit board.

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY (2022)

Article Biochemical Research Methods

Field-Switching Repeller Flowing Atmospheric-Pressure Afterglow Drift Tube Ion Mobility Spectrometry

Mohsen Latif, Xi Chen, Viraj D. Gandhi, Carlos Larriba-Andaluz, Gerardo Gamez

Summary: In this work, a field-switching technique combined with a flowing atmospheric pressure afterglow source was used to enhance drift tube ion mobility spectrometry. By substituting the Bradbury-Nielsen gate with a tip-repeller electrode, the performance of the ion mobility spectra was optimized and the limit of detection was significantly improved. Various operating conditions were optimized and compared with literature results.

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY (2022)

Article Biochemical Research Methods

Quantitative Analysis of Exhaled Breath Collected on Filter Substrates via Low-Temperature Plasma Desorption/Ionization Mass Spectrometry

Xiaoxia Gong, Songyue Shi, Dong Zhang, Gerardo Gamez

Summary: Breath analysis has great potential for early disease diagnostics and clinical drug monitoring, but current mass spectrometer accessibility limitations restrict its point-of-care applications. Researchers have developed an offLine method for quantitative analysis of exhaled breath using low-temperature plasma-mass spectrometry, with optimized conditions showing competitive or significantly better detection limits compared to relevant techniques.

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY (2022)

Article Chemistry, Analytical

High-Throughput Nanoparticle Characterization via Glow Discharge Optical Emission Spectroscopy Elemental Mapping

Kevin Finch, Aldo Hernandez, Gerardo Gamez

Summary: Nanoparticle characterization is important in various fields, but traditional techniques have limitations in sample throughput, size measurement, and elemental composition analysis. Glow discharge optical emission spectroscopy (GDOES) EM is demonstrated as an effective method for NP characterization, providing large-area maps quickly and cost-effectively. By optimizing conditions, size differentiation of Ag and Au nanoparticles and identification of internal dimensions of complex core-shell NPs were successfully achieved.

ANALYTICAL CHEMISTRY (2023)

Article Chemistry, Analytical

Radially resolved optical emission spectral imaging study of an atmospheric pressure μDBD jet for elucidating the effect of sample surface material on the underlying mechanisms

Songyue Shi, Kevin Finch, Gerardo Gamez

Summary: This study investigated the energy transfer mechanisms of an atmospheric pressure helium micro-dielectric barrier discharge on a sample surface using optical emission spectroscopy. The results showed that the sample surface plays a significant role in the energy transfer mechanisms, with different spatial distributions of excited species observed for different types of samples. This research provides insights into the dynamics of energy transfer in dielectric barrier discharges exposed to sample surfaces.

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY (2021)

Article Chemistry, Analytical

A transmission-type triple grating spectrograph for improved laser scattering diagnostics of low-density plasmas used in chemical analysis

Kevin Finch, Aldo Hernandez, Yue She, Songyue Shi, Gerardo Gamez

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY (2020)

No Data Available