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Ambient ionization mass spectrometry for rapid detection of biological warfare agents and their simulants

MICROCHEMICAL JOURNAL (2023)

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Summary: In the past 15 years, ambient ionization techniques, particularly matrix-assisted laser desorption electrospray ionization, have made significant advancements in mass spectrometry imaging. These techniques have been developed and improved with different laser systems and mass spectrometers, leading to transformative developments in the imaging platform.

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Boron-doped carbon nanowalls for fast and direct detection of cytochrome C and ricin by matrix-free laser desorption/ionization mass spectrometry

I. S. Hosu et al.

Summary: This study demonstrated the improved performance of carbon nanowalls (CNWs) in detecting proteins through SALDI-MS method. The CNWs showed better signal intensity and reliability in qualitative and quantitative detection of Cytochrome C and ricin B chain. The introduction of galactosamine residues on B-CNW enhanced the detection in complex media.

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Article Chemistry, Analytical

High-Throughput Nanoliter Sampling and Direct Analysis of Biological Fluids Using Droplet Imbibition Mass Spectrometry

Taghi Sahraeian et al.

Summary: A high-throughput droplet imbibition mass spectrometry experiment was developed for direct analysis of ultra-small volumes of complex mixtures. This method utilizes glass capillaries and charged microdroplets to sample and transfer the analyte, resulting in increased sensitivity and analysis efficiency.

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Mass Spectrometry-Based High-Throughput Quantification of Bioproducts in Liquid Culture

Shuaizhen Zhou et al.

Summary: To meet the increasing need for high-throughput screening in metabolic engineering, a fast and information-rich screening method is required. Liquid extraction surface analysis coupled with mass spectrometry (LESA-MS) is an efficient approach that directly samples and introduces metabolites from a surface to MS. In this study, LESA-MS combined with an acoustic liquid handler and stable isotope-labeled internal standards, enabling absolute quantitation of target chemicals and high-throughput screening for microbial metabolites.

ANALYTICAL CHEMISTRY (2023)

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Article Chemistry, Analytical

PAMAM-Functionalized Paper as a New Substrate for the Paper Spray Mass Spectrometry Measurement of Proteins

Igor Pereira et al.

Summary: The paper surface functionalization with PAMAM dendrimers enhanced the sensitivity of protein analysis using paper spray mass spectrometry (PS-MS). PAMAM could electrostatically interact with negatively charged residues on the protein surface and also form hydrogen bonds with protein surface oxygens, making it a useful material for protein extraction. Experimental results showed that PAMAM-functionalized paper substrates exhibited higher sensitivity for albumin, hemoglobin, insulin, and lysozyme compared to unmodified paper strips.

ANALYTICAL CHEMISTRY (2023)

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Article Biochemical Research Methods

Strain-Level Discrimination of Bacteria by Liquid Chromatography and Paper Spray Ion Mobility Mass Spectrometry

Orobola E. Olajide et al.

Summary: Determining bacterial identity at the strain level using LC-IM-MS/MS is effective in distinguishing E. coli strains, with prediction rates of 96.1% and 100% for negative and positive ion information, respectively. The PS-IM-MS/MS technique, a faster method, achieved prediction rates of 62.5% and 73.5% in negative and positive ion modes, respectively. The fusion of negative and positive ion data increased the classification rates to 80.5%.

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY (2023)

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Article Chemistry, Analytical

Hyperspectral Visualization-Based Mass Spectrometry Imaging by LMJ-SSP: A Novel Strategy for Rapid Natural Product Profiling in Bacteria

Jian Yu et al.

Summary: The liquid micro-junction surface sampling probe (LMJ-SSP)-based mass spectrometry imaging (MSI) allows for rapid profiling of natural products from Gram-negative marine bacteria Pseudoalteromonas without sample preparation. By creating a hyperspectral image using a conductance-based autosampling platform and multivariant analysis, different natural products can be quickly identified by color differences. This approach provides an efficient and sensitive strategy for direct and rapid natural product profiling from different Pseudoalteromonas strains.

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Article Chemistry, Applied

Paper spray ionization mass spectrometry applied for quantification of pesticides and discrimination from tomato varieties (Solanum lycopersicum)

Ayrton M. S. Santos et al.

Summary: In this study, the determination of pesticide residues in tomatoes was carried out using the Paper Spray Ionization Mass Spectrometry (PSI-MS) combined with Principal Component Analysis (PCA) for differentiation of tomato varieties and quantification of pesticide residues. PSI-MS was used for metabolic profiling and PCA was applied for grouping the samples according to the tomato variety. The results demonstrated the potential of PSI-MS as a rapid and simple analytical tool for pesticide residue determination in agricultural products.

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Article Microbiology

Volatile Organic Compound Profile Fingerprints Using DART-MS Shows Species-Specific Patterns in Fusarium Mycotoxin Producing Fungi

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Summary: This study investigates the volatile organic compounds (VOCs) of various species of Fusarium using direct analysis in real time mass spectrometry (DART-MS). The results reveal the detection of ions with high concentrations in some species, and the relative concentrations of VOCs differ between species. The methodology shows potential for convenient detection and identification of Fusarium contamination in agricultural commodities.

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Article Chemistry, Analytical

Ultrahigh-Throughput Sample Analysis Using Liquid Atmospheric Pressure Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry

Henriette Krenkel et al.

Summary: Mass spectrometry enables automated analysis of complex samples without labeling. Liquid atmospheric pressure matrix-assisted laser desorption/ionization (LAP-MALDI) allows for rapid sample preparation and high-speed mass spectrometry analysis. This technology achieves a significant increase in analysis speed, has high ion signal stability, and can analyze multiply charged peptide ions at extreme speeds.

ANALYTICAL CHEMISTRY (2022)

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Article Biotechnology & Applied Microbiology

Assessing direct analysis in real-time mass spectrometry for the identification and serotyping of Legionella pneumophila

Alessandra Tata et al.

Summary: The study demonstrates that the DART-HMRS method has good accuracy and is an effective approach for Legionella serogroup profiling. These preliminary findings could lead to a new avenue for rapid identification and epidemiologic tracing of L. pneumophila, improving risk assessment.

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Applications of vacuum MAI on a portable mass spectrometer

Yi-Hsin Chen et al.

Summary: Mass spectrometry has the potential to provide faster and more accurate analyses for diagnosing diseases than current diagnostics and point-of-care technologies. A portable mass spectrometer using a homebuilt ionization source based on matrix-assisted ionization (MAI) was developed for clinical measurements. This portable MAI-MS allows for both qualitative and quantitative analysis of clinically-relevant samples with user-friendly sample introduction.

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY (2022)

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Article Biochemistry & Molecular Biology

Rapid Characterization of Bacterial Lipids with Ambient Ionization Mass Spectrometry for Species Differentiation

Hung Su et al.

Summary: An analytical platform combining probe sampling, thermal desorption-electrospray ionization/mass spectrometry (TD-ESI/MS), and multivariate statistical analysis was developed to rapidly differentiate bacterial species based on the differences in their lipid profiles. The results were validated by protein fingerprinting using matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF). The developed platform showed promising potential as a useful diagnostic tool for rapidly distinguishing bacterial species.

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Machine Learning Approaches to Identify Discriminative Signatures of Volatile Organic Compounds (VOCs) from Bacteria and Fungi Using SPME-DART-MS

Mehak Arora et al.

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Species-level discrimination of microorganisms by high-resolution paper spray-Ion mobility-Mass spectrometry

Orobola E. Olajide et al.

Summary: This study utilized paper spray technique coupled with ion mobility separation and tandem mass spectrometry to rapidly discriminate and identify Bacillus species. By combining numerical multivariate statistics and ion mobility separation, the prediction rates were significantly improved, enabling high-precision identification of bacterial species and strains.

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY (2022)

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Carbon fiber paper spray ionization mass spectrometry

Shanshan Wang et al.

Summary: Carbon fiber paper (CFP) is explored as a specific paper substrate in paper spray ionization mass spectrometry (PSI-MS), known as CFPSI-MS. CFPSI-MS combines the advantages of PSI and carbon fiber ionization (CFI) and shows improved performance in analyzing various compounds. CFP enhances signal stability and detection sensitivity, especially in negative ionization mode.

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Fan Pu et al.

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Ambient Ionization Mass Spectrometry: Application and Prospective

Lulu Shi et al.

Summary: Mass spectrometry is a powerful analytical tool for analyzing compounds and providing information on their molecular weights and chemical structures. Ambient ionization mass spectrometry has rapidly developed and proven its scientific improvements in various domains. It allows real-time detection of analytes without sample preparation in an open environment.

CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY (2022)

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Next-Generation Infrared Matrix-Assisted Laser Desorption Electrospray Ionization Source for Mass Spectrometry Imaging and High-Throughput Screening

Kevan T. Knizner et al.

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JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY (2022)

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Native ambient mass spectrometry of intact protein assemblies directly from Escherichia coli colonies

Yuying Du et al.

Summary: In this study, we demonstrated that intact non-covalent protein complexes can be directly detected from bacterial colonies growing on agar by combining electroporation with native ambient mass spectrometry. Homodimers HdeA and HdeB, as well as the 50 kDa Mn-bound superoxide dismutase homodimer, were identified, along with some previously undetected monomeric proteins.

CHEMICAL COMMUNICATIONS (2022)

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Review Chemistry, Analytical

Applications of ambient ionization mass spectrometry in 2021: An annual review

Stephanie Rankin-Turner et al.

Summary: Ambient ionization mass spectrometry (AIMS) has revolutionized analytical chemistry by enabling direct analysis of samples in their original state. This review covers the applications of AIMS techniques in 2021, with a focus on disease diagnostics, forensics and security, food safety testing, and environmental sciences. The emphasis in AIMS research is shifting towards improving existing techniques in terms of reproducibility, quantification, and ease-of-use.

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Application of direct analysis in real-time mass spectrometry (DART-MS) in forensic science: a comprehensive review

Swati Gupta et al.

Summary: This article provides an insight into the ionization mechanisms, data analysis tools, and the use of hyphenated techniques in DART-MS. It summarizes the applications of DART-MS in Forensic Science from 2005 to 2021, including the analysis of drugs, warfare agents, gun-shot residues, ink differentiation, and other forensically relevant samples. The paper also discusses the relationship between the type of DART-MS technique and the ionization mode used for specific compounds.

EGYPTIAN JOURNAL OF FORENSIC SCIENCES (2022)

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Vibrating Sharp-edge Spray Ionization (VSSI) for voltage-free direct analysis of samples using mass spectrometry

Xiaojun Li et al.

Summary: Vibrating Sharp-edge Spray Ionization (VSSI) is a voltage-free ionization method that can generate a spray of liquid samples without the need for a high electric field. It is versatile for analyzing various chemical species and sensitive biological samples, making it suitable for field portable applications.

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Matrix-assisted ionization mass spectrometry in targeted protein analysis - An initial evaluation

Oystein Skjaervo et al.

Summary: Rationale Matrix-assisted ionization (MAI) is a new ionization technique with less matrix effects than electrospray ionization (ESI), making it promising for targeted protein determination in biological samples. The simplicity, ease of use, and speed of MAI-SRM-MS demonstrate its potential for bottom-up protein analysis, although further data is needed for clinical applications.

RAPID COMMUNICATIONS IN MASS SPECTROMETRY (2021)

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Matrix-assisted ionization Fourier transform mass spectrometry for the analysis of lipids

Rohana Liyanage et al.

Summary: The vacuum MAI technique is a rapid, simple, and complementary method for the characterization of polar and non-polar lipids in complex mixtures, producing comparable and complementary results to benchmark MALDI and ESI methods.

RAPID COMMUNICATIONS IN MASS SPECTROMETRY (2021)

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Review Biochemical Research Methods

An overview of biological applications and fundamentals of new inlet and vacuum ionization technologies

Sarah Trimpin et al.

Summary: The developments of new ionization technologies in mass spectrometry have shown unique processes, capabilities, and analytical potential. These methods include SAI, MAI, and laserspray ionization, allowing for analysis of various materials and expanding the application of mass spectrometry.

RAPID COMMUNICATIONS IN MASS SPECTROMETRY (2021)

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Article Biochemical Research Methods

Development of a new atmospheric pressure plasmaspray ionization for ambient mass spectrometry

Zhen Peng et al.

Summary: Plasmaspray ionization (PSI) is a new atmospheric pressure ionization method developed as an alternative ambient ion source for mass spectrometry, showing better linearity and sensitivity for organic compounds compared to electrospray ionization (ESI). For protein samples, it presents wider distributions of multiply charged ions and higher mass resolution without sacrificing any sensitivity. The mechanism of PSI involves charge build-up process on the tip of capillary and stimulated pulsed voltage on the flow tube to promote ion aggregation speed.

JOURNAL OF MASS SPECTROMETRY (2021)

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Review Spectroscopy

FIELDABLE MASS SPECTROMETRY FOR FORENSIC SCIENCE, HOMELAND SECURITY, AND DEFENSE APPLICATIONS

Kenyon Evans-Nguyen et al.

Summary: Mass spectrometry is widely used in forensic chemistry laboratories, with efforts to develop ruggedized, fieldable instruments for on-site analysis. Testing samples in the field is of particular interest in forensic science, homeland security, and defense applications. Mass spectrometry is well suited for providing definitive answers with low false positive rates in homeland security and military applications.

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Article Biochemical Research Methods

Microdroplet Impact-Induced Spray Ionization Mass Spectrometry (MISI MS) for Online Reaction Monitoring and Bacteria Discrimination

Pallab Basuri et al.

Summary: MISI is a method that involves the impact of microdroplets produced from a paper and their impact on another, leading to the ionization of analytes. This method performs reactions and ionization simultaneously without the need for high voltage directly applied on the sample, and it can be used for detecting small molecules and proteins. Multiple cascaded spray sources can be assembled in series, providing a way to understand chemical reactions by droplet impact and demonstrating noninvasive discrimination of bacteria samples under ambient conditions.

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY (2021)

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Article Biochemical Research Methods

A Combination MAI and MALDI Vacuum Source Operational from Atmospheric Pressure for Fast, Robust, and Sensitive Analyses

Khoa Hoang et al.

Summary: A new vacuum ionization source has been developed to provide fast multisample introduction to vacuum and rapid sequential ionization, duplicating the sensitivity and robustness of probe device. This source design allows for ionization using either vMAI or vMALDI, with the ability to switch between ionization modes in seconds. The combination of these two ionization methods improves molecular analyses of sample composition, with the potential for low-cost high-throughput automation.

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GONDWANA RESEARCH (2021)

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Oliver J. Hale et al.

Summary: In this study, the integration of travelling wave ion mobility spectrometry (TWIMS) into native nanoDESI MSI workflow was demonstrated, showing improved specificity in ion images by allowing subtraction of chemical noise and enabling the calculation of collision cross sections for protein structure. Results presented ion images and collision cross sections for a variety of proteins and protein assemblies with molecular weights up to 42.6 kDa, showing good agreement with experimental and literature-derived values.

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY (2021)

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Article Biochemical Research Methods

Liquid Extraction Surface Analysis Mass Spectrometry of ESKAPE Pathogens

Jana Havlikova et al.

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JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY (2021)

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Article Biochemical Research Methods

Probing Folded Proteins and Intact Protein Complexes by Desorption Electrospray Ionization Mass Spectrometry

Bin Yan et al.

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Article Chemistry, Analytical

Development of a miniature protein mass spectrometer capable of analyzing native proteins

Qian Xu et al.

Summary: A miniature protein mass spectrometer was developed for rapid identification of proteins and their conformations, with high mass resolution and sensitivity. Coupling the instrument with a soft electrospray ionization source allowed the acquisition of mass spectra of native proteins.

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Isabel Steppert et al.

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Microdroplet Mass Spectrometry Enables Extremely Accelerated Pepsin Digestion of Proteins

Tobias Rainer et al.

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Vera Plekhova et al.

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Depth-Dependent Chemical Analysis of Handwriting by Nanospray Desorption Electrospray Ionization Mass Spectrometry

Gwangbin Lee et al.

Summary: Nano-DESI MS has been explored in the forensic chemical analysis of ink directly from handwriting on paper, showing the potential for changing mass spectral profiles over time to reflect the differential distribution of analytes in a vertical direction. The study confirmed the capability of the depth-dependent analysis of nano-DESI MS.

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Wire Desorption Combined with Electrospray Ionization Mass Spectrometry: Direct Analysis of Small Organic and Large Biological Compounds

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VOC fingerprints: metabolomic signatures of biothreat agents with and without antibiotic resistance

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Novel ionization processes for use in mass spectrometry: 'Squeezing' nonvolatile analyte ions from crystals and droplets

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Application of High-Field Asymmetric Waveform Ion Mobility Separation to LESA Mass Spectrometry of Bacteria

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Strain-Level Differentiation of Bacteria by Paper Spray Ionization Mass Spectrometry

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Addition of Serine Enhances Protein Analysis by DESI-MS

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Detection of Protein Toxin Simulants from Contaminated Surfaces by Paper Spray Mass Spectrometry

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Utilisation of Ambient Laser Desorption Ionisation Mass Spectrometry (ALDI-MS) Improves Lipid-Based Microbial Species Level Identification

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Sensitive analysis of trace macrolide antibiotics in complex food samples by ambient mass spectrometry with molecularly imprinted polymer-coated wooden tips

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