Article
Chemistry, Analytical
Eric J. Davis, David Walker, Molly Gibney, Brian H. Clowers
Summary: The research investigated the transition between ESI and CDI modes with respect to applied bias, revealing that CDI reaches stable state faster in positive mode compared to ESI, while stability in negative mode varies greatly in both modes. When examining the resultant ions, it was found that the impact of increased bias on an ESI needle was species-dependent, with labile species showing significant fragmentation at higher biases.
Article
Energy & Fuels
Carla Santos de Freitas, Jeferson A. Valencia-Davila, Rosana Cardoso Lopes Pereira, Luiza Torres Abrantes, Lucilia Kato, Boniek Gontijo Vaz
Summary: The study focused on the extraction and fractionation of sulfur-containing compounds from vacuum gas oil using non-reactive methods such as ligand exchange chromatography and molecularly imprinted polymer. Different sorbents and cations were used to isolate specific sulfur compounds, resulting in varying degrees of selectivity and separation efficiency. Further analysis by high-performance liquid chromatography coupled with atmospheric pressure chemical ionization Orbitrap mass spectrometry allowed for the detection of a wider range of sulfur compounds with different degrees of unsaturation.
Article
Chemistry, Analytical
Julian Schneemann, Karl-Christian Schaefer, Bernhard Spengler, Sven Heiles
Summary: This study presents a module that enhances the signal intensity of nonpolar compounds in MSI experiments. The module allows for the analysis of mouse tissue and caterpillar tissue, providing insight into the spatial distribution of nonpolar analytes.
ANALYTICAL CHEMISTRY
(2022)
Article
Physics, Applied
O. Polonskyi, T. Hartig, J. R. Uzarski, M. J. Gordon
Summary: Dielectric insulators with patterned topographic relief are utilized to spatially define filamentary microdischarges in atmospheric pressure DBD plasmas, enabling localized surface treatment such as etching, micro-texturing, and wettability modification. This approach allows for the generation of arbitrary discharge patterns, anisotropic etching of materials, and spatial patterning of surface properties without the need for lithographic masks. The method provides a user-defined way to pattern DBD streamers for subsequent surface modification, material deposition, or etching.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Analytical
Moritz Hitzemann, Christoph Schaefer, Ansgar T. Kirk, Alexander Nitschke, Martin Lippmann, Stefan Zimmermann
Summary: In this paper, a new and easy to assemble dielectric barrier discharge plasma ionization source is presented, which is based on printed circuit boards with two parallel isolated electrodes for generating plasma inside an inert fused silica capillary. The plasma source is coupled to an ion mobility spectrometer for demonstration. Different ionization pathways can be achieved by whether the analytes pass through the plasma or bypass it before entering the reaction region of the ion mobility spectrometer. The plasma source has been designed using electric field simulations and can reach detection limits in the mid pptv range.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Sebastian van Wasen, Yi You, Sebastian Beck, Jens Riedel, Dietrich A. Volmer
Summary: The combination of acoustically levitated droplets, mid-IR laser evaporation, and subsequent post-ionization by secondary electrospray ionization was used to monitor the enzymatic digestion of various proteins. Acoustically levitated droplets provide a wall-free model reactor for compartmentalized microfluidic trypsin digestions. Time-resolved interrogation of the droplets provides real-time information on the reaction progress and insights into reaction kinetics. Importantly, the experimental setup can be used for the real-time investigation of chemical reactions and uses only a fraction of the typically applied amounts of solvent, analyte, and trypsin, making it a green analytical chemistry alternative to batch reactions.
ANALYTICAL CHEMISTRY
(2023)
Review
Chemistry, Physical
Tatiane Fonseca de Melo, Lucas Cabral Rocha, Rutilo Pereira Silva, Rodrigo Savio Pessoa, Andreia Mitsa Paiva Negreiros, Rui Sales Junior, Moises Bento Tavares, Clodomiro Alves Junior
Summary: Research on the interaction between cold atmospheric plasma and saline water has developed significantly in recent years. The study found that this interaction can produce reactive oxygen and nitrogen species, affect the conductivity and pH of saline water, and influence the distance and interaction area between the electrode and solution. These findings have important implications for the development of desalination and liquid property improvement technologies.
Article
Green & Sustainable Science & Technology
Hengyu Guo, Jie Chen, Longfei Wang, Aurelia Chi Wang, Yafeng Li, Chunhua An, Jr-Hau He, Chenguo Hu, Vincent K. S. Hsiao, Zhong Lin Wang
Summary: This study introduces a corona-type, mechanically stimulated triboelectric NAI generator that efficiently produces negative air ions for air purification. The device is simple, safe, and effective, offering a sustainable solution for improving indoor air quality.
NATURE SUSTAINABILITY
(2021)
Article
Chemistry, Analytical
Tobias Reinecke, Steven Kenyon, Keith Gendreau, Brian H. Clowers
Summary: This study demonstrates an ion mobility spectrometry (IMS) system that utilizes a modulated X-ray source (MXS) for ion generation and initiation of the IMS experiment without the need for a traditional gating structure. By adjusting the pulse duration and X-ray beam width, the analytical performance of the instrument can be significantly improved, and multiplexing with a shutterless system can further enhance ion throughput and signal-to-noise ratio.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Daniel Foest, Alexander Knodel, Robert Ahrends, Cristina Coman, Joachim Franzke, Sebastian Brandt
Summary: Electrospray ionization mass spectrometry (ESI-MS) is a well-established method for identifying biomarkers. However, the less-polar free cholesterol, an important biomarker for human diseases, cannot be effectively ionized by nano-ESI. This study presents the use of the flexible microtube plasma (F mu TP) as a consecutive-ionization source to determine cholesterol in nESI-MS analysis. The nESI-F mu TP approach significantly increases the yield of cholesterol ions in complex samples.
ANALYTICAL CHEMISTRY
(2023)
Article
Physics, Applied
Alexandra Brisset, Andrew R. Gibson, Sandra Schroeter, Kari Niemi, Jean-Paul Booth, Timo Gans, Deborah O'Connell, Erik Wagenaars
Summary: This study investigates the impact of adding oxygen and water vapor to helium plasma on the density of OH, revealing that the addition of O-2 leads to a significant increase in atomic oxygen density. The simulations show that OH, O, and O-3 densities can be controlled relatively independently over a wide range of conditions through the addition of multiple gas admixtures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Takamasa Okumura, Pankaj Attri, Kunihiro Kamataki, Naoto Yamashita, Yuichi Tsukada, Naho Itagaki, Masaharu Shiratani, Yushi Ishibashi, Kazuyuki Kuchitsu, Kazunori Koga
Summary: This study provides experimental evidence that atmospheric-pressure air dielectric barrier discharge plasma irradiation introduces nitrate ion (NO3-) as reactive oxygen and nitrogen species (RONS) in lettuce seeds, promoting their germination. The ion introduced by plasma irradiation was detected and identified as NO3- using various analytical techniques. Scanning electron microscopy revealed no surface changes on the seeds after plasma irradiation. Plasma irradiation is an effective method for introducing NO3- into seeds without causing damage.
SCIENTIFIC REPORTS
(2022)
Article
Biochemical Research Methods
Li-Xue Jiang, Matthias Polack, Xiangtang Li, Manxi Yang, Detlev Belder, Julia Laskin
Summary: Novel laser-assisted etching of a fused silica microfluidic probe for liquid extraction-based ambient mass spectrometry imaging provides a simplified and scalable fabrication method for robust monolithic microfluidic probes. Evaluation on mouse tissue sections demonstrates the capability of this technology.
Article
Chemistry, Analytical
Meng Chen, Yuhan Shang, Hua Bai, Qiang Ma
Summary: A green analytical protocol has been developed for the analysis of anionic compounds. By optimizing operational parameters and using specific ionization and mass spectrometry analysis strategies, the signal intensity was significantly enhanced, and the accuracy and sensitivity of the method were validated. The high greenness score indicates a wide range of potential applications.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Meng Chen, Yuhan Shang, Hua Bai, Qiang Ma
Summary: Green analytical chemistry aims to develop analytical methods that minimize the use and generation of hazardous substances to protect human health and the environment. In this study, a green analytical protocol was developed for the analysis of anionic compounds using ionization spraying and a miniature mass spectrometer. The method achieved efficient analysis of haloacetic acids through optimization of operational parameters and the use of dual-channel ionization and mass spectrometry. The method demonstrated high recoveries, low detection and quantification limits, and displayed a high degree of greenness.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Sy-Chyi Cheng, Siou-Sian Jhang, Min-Zong Huang, Jentaie Shiea
ANALYTICAL CHEMISTRY
(2015)
Article
Biochemical Research Methods
Yi-Ying Kao, Sy-Chyi Cheng, Chu-Nian Cheng, Jentaie Shiea
JOURNAL OF MASS SPECTROMETRY
(2016)
Article
Chemistry, Analytical
Sy-Chyi Cheng, Chin-Hsiung Wang, Jentaie Shiea
ANALYTICAL CHEMISTRY
(2016)
Article
Biochemical Research Methods
Sy-Chyi Cheng, Yen-Ting Chen, Siou-Sian Jhang, Jentaie Shiea
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2016)
Article
Biochemical Research Methods
Sy-Chyi Cheng, Suhail Muzaffar Bhat, Jentaie Shiea
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
(2017)
Article
Chemistry, Analytical
Hung Su, Min-Zong Huang, Jo-Han Chou, Ting-Hao Chang, Yu-Min Jiang, Yi-Tzu Cho, Sy-Chyi Cheng, Ming-Tsang Wu, Jentaie Shiea
ANALYTICA CHIMICA ACTA
(2018)
Article
Physics, Atomic, Molecular & Chemical
Sy-Chyi Cheng, Suhail Muzaffar Bhat, Chi-Wei Lee, Jentaie Shiea
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2018)
Article
Food Science & Technology
Sy-Chyi Cheng, You-Da Tsai, Chi-Wei Lee, Bai-Hsiun Chen, Jentaie Shiea
JOURNAL OF FOOD AND DRUG ANALYSIS
(2019)
Article
Chemistry, Analytical
Sy-Chyi Cheng, Suhail Muzaffar Bhat, Chi-Wei Lee, Jentaie Shiea
ANALYTICA CHIMICA ACTA
(2019)
Article
Chemistry, Analytical
Sy-Chyi Cheng, Ruei-Hao Lee, Jing-Yueh Jeng, Chi-Wei Lee, Jentaie Shiea
ANALYTICA CHIMICA ACTA
(2020)
Article
Chemistry, Analytical
Sy-Chyi Cheng, Hsing-Jung Lin, Chi-Yang Lee, Min-Zong Huang, Jentaie Shiea
Summary: A simple flame-induced atmospheric pressure chemical ionization source was developed to couple a gas chromatograph with a mass spectrometer. Protonated analytes were formed by reacting with flame-induced charged species through ion-molecule reactions in the ionization region. This method is suitable for the characterization of fatty acid methyl esters and long-chain normal alkanes.
ANALYTICA CHIMICA ACTA
(2022)
Article
Biochemical Research Methods
Jentaie Shiea, Hsing-Jung Lin, Suhail Muzaffar Bhat, Chi-Yang Lee, Min-Zong Huang, Vinoth Kumar Ponnusamy, Sy-Chyi Cheng
Summary: Flame-induced atmospheric pressure chemical ionization (FAPCI) was used to analyze mixtures through the interface of thin layer chromatography (TLC) and mass spectrometry (MS). The method proved effective for characterizing thermally stable volatile and semi-volatile compounds in mixtures.
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
(2022)
Article
Plant Sciences
Wan-Ting Sun, Sy-Chyi Cheng, Ya-Ting Chao, Shu-Yao Lin, Ting-Ting Yang, Yi-Ping Ho, Ming-Che Shih, Swee-Suak Ko
Summary: This study investigated the morphology, cytology, biochemistry, and sucrose transporters in the pollinia of Phalaenopsis orchids. Results showed that the mature pollinia accumulated high levels of sugars, including sucrose, galactinol, myo-inositol, and glucose, which provided nutrients and enhanced pollinia germination and tube growth. The expression of sucrose transporters in the pollinia was associated with pollinia maturation and germination.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Review
Chemistry, Analytical
Sy-Chyi Cheng, Christopher Shiea, Yeou-Lih Huang, Chin-Hsiung Wang, Yi-Tzu Cho, Jentaie Shiea
ANALYTICAL METHODS
(2017)
Article
Chemistry, Analytical
Christopher Shiea, Yeou-Lih Huang, Sy-Chyi Cheng, Yi-Lun Chen, Jentaie Shiea
ANALYTICA CHIMICA ACTA
(2017)