Results 21 to 30 of about 623,539 (276)

Microextraction for ambient ionization mass spectrometry analysis

Advances in Sample Preparation, 2022
Ambient ionization allows desorption of molecules and formation of ions directly from samples in native environment. Compared with traditional ionization techniques, it has unique features of simplicity and convenience, thus has attracted considerable ...
Yijing Liu, Yuhan Shang, Qiang Ma
doaj   +1 more source

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

Metabolites, 2022
Point-of-care screening tools are essential to expedite patient care and decrease reliance on slow diagnostic tools (e.g., microbial cultures) to identify pathogens and their associated antibiotic resistance.
Mehak Arora, Stephen C. Zambrzycki, Joshua M. Levy, Annette Esper, Jennifer K. Frediani, Cassandra L. Quave, Facundo M. Fernández, Rishikesan Kamaleswaran   +7 more
doaj   +1 more source

Enhancing Metabolomic Coverage in Positive Ionization Mode Using Dicationic Reagents by Infrared Matrix-Assisted Laser Desorption Electrospray Ionization

Metabolites, 2021
Mass spectrometry imaging is a powerful tool to analyze a large number of metabolites with their spatial coordinates collected throughout the sample. However, the significant differences in ionization efficiency pose a big challenge to metabolomic mass ...
Ying Xi, David C. Muddiman
doaj   +1 more source

Analysis of Pesticide Residues on Fruit Using Swab Spray Ionization Mass Spectrometry

Molecules, 2023
The vast quantity and high variety of pesticides globally used in agriculture entails considerable risks for the environment and requires ensuring the safety of food products.
Thomas Michael Muggli, Stefan Schürch
doaj   +1 more source

APLICAÇÃO DA ESPECTROMETRIA DE MASSAS COM IONIZAÇÃO POR PAPER SPRAY E TÉCNICAS RELACIONADAS NA ANÁLISE DIRETA DE MATRIZES BIOLÓGICAS PARA DETECÇÃO DE DROGAS - UMA REVISÃO [PDF]

Química Nova, 2023
In recent years, technological development in analytical instrumentation has progressed vigorously, which has allowed the evolution of analytical techniques that play an indispensable role within society, highlighting mass spectrometry.
João Francisco Allochio Filho, Bruna Carneiro Pires, Nayara A. Santos, Sara Joaquina Inocencio Dionisio, Nathália dos S. Conceição, Amanda Eiriz Feu, Warley de Souza Borges, Valdemar Lacerda Jr., Wanderson Romão   +8 more
doaj   +1 more source

A Low-Cost, Simplified Platform of Interchangeable, Ambient Ionization Sources for Rapid, Forensic Evidence Screening on Portable Mass Spectrometric Instrumentation

Instruments, 2018
Portable mass spectrometers (MS) are becoming more prevalent due to improved instrumentation, commercialization, and the robustness of new ionization methodologies.
Patrick W. Fedick, William L. Fatigante, Zachary E. Lawton, Adam E. O’Leary, Seth. E. Hall, Ryan M. Bain, Stephen T. Ayrton, Joseph A. Ludwig, Christopher C. Mulligan   +8 more
doaj   +1 more source

Aggregation of Multimodal ICE-MS Data into Joint Classifier Increases Quality of Brain Cancer Tissue Classification

Data, 2022
Mass spectrometry fingerprinting combined with multidimensional data analysis has been proposed in surgery to determine if a biopsy sample is a tumor.
Anatoly A. Sorokin, Denis S. Bormotov, Denis S. Zavorotnyuk, Vasily A. Eliferov, Konstantin V. Bocharov, Stanislav I. Pekov, Evgeny N. Nikolaev, Igor A. Popov   +7 more
doaj   +1 more source

Characterizing the Dyes of Pre-Columbian Andean Textiles: Comparison of Ambient Ionization Mass Spectrometry and HPLC-DAD

Heritage, 2021
The complex and colorful textiles of ancient Peru have long been a focus of technical study, particularly to characterize the sources of the wide variety of dyes utilized by these Andean artisans.
Jennifer Campos Ayala, Samantha Mahan, Brenan Wilson, Kay Antúnez de Mayolo, Kathryn Jakes, Renée Stein, Ruth Ann Armitage   +6 more
doaj   +1 more source

Performance of a corona ion source for measurement of sulfuric acid by chemical ionization mass spectrometry [PDF]

, 2010
The performance of an ion source based on corona discharge has been studied. This source is used for the detection of gaseous sulfuric acid by chemical ionization mass spectrometry (CIMS) through the reaction of NO−3 ions with H2SO4.
Rondo, L, Ehrhart, Sebastian, Curtius, Joachim, A. Kürten, Rondo, Linda, L. Rondo, Kürten, Christoph Andreas, J. Curtius, Curtius, J, S. Ehrhart, Ehrhart, S, Kürten, A   +11 more
core   +2 more sources

Toward Depth-Resolved Analysis of Plant Metabolites by Nanospray Desorption Electrospray Ionization Mass Spectrometry

Molecules, 2022
Nanospray desorption electrospray ionization (nano-DESI) is one of the ambient desorption ionization methods for mass spectrometry (MS), and it utilizes a steady-state liquid junction formed between two microcapillaries to directly extract analytes from ...
Sangwon Cha, Gyouwoong Jun, Yougyeong Park, Sung Jun An, Donghoon Lee   +4 more
doaj   +1 more source