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Article
Rapid analysis of untreated food samples by gel loading tip spray ionization mass spectrometry
Rapid, efficient, versatile, easy-to-use, and non-expensive analytical approaches are globally demanded for food analysis. Many ambient ionization approaches based on electrospray ionization (ESI) have been de...
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Article
Open AccessEfficient catalyst-free N2 fixation by water radical cations under ambient conditions
The growth and sustainable development of humanity is heavily dependent upon molecular nitrogen (N2) fixation. Herein we discover ambient catalyst-free disproportionation of N2 by water plasma which occurs via th...
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Article
Open AccessAlterations in lipid profile upon uterine fibroids and its recurrence
Uterine fibroids (UF) is the most common (about 70% cases) type of gynecological disease, with the recurrence rate varying from 11 to 40%. Because UF has no distinct symptomatology and is often asymptomatic, t...
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Article
High throughput online sequential extraction of natural rare earth elements and determination by mass spectrometry
As the beginning of rare earth industry, several days are normally required for characterization of rare earth elements (REEs) fractionation in ore samples. Herein, rapid fractionation analysis of 15 REEs and ...
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Article
Correction to: Direct Analysis of Aqueous Solutions and Untreated Biological Samples Using Nanoelectrospray Ionization Mass Spectrometry with Pipette Tip in Series with High-Ohmic Resistor as Ion Source
Md. Matiur Rahman’s name was incorrect in the original publication of this article.
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Article
Molecular analysis of semen-like odor emitted by chestnut flowers using neutral desorption extractive atmospheric pressure chemical ionization mass spectrometry
Knowledge about the chemical composition of floral volatile organic compounds (VOCs) is valuable in biological studies as well as for the flavor, cosmetic, and fragrance industries. The flowers of Chinese ches...
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Article
Direct Analysis of Aqueous Solutions and Untreated Biological Samples Using Nanoelectrospray Ionization Mass Spectrometry with Pipette Tip in Series with High-Ohmic Resistor as Ion Source
Commercially available disposable plastic pipette tip with the inner diameter of ca. 120 μm in series with a high-ohmic resistor (10 GΩ) was adapted as a low-cost alternative ion source for high-throughput nan...
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Article
A Comparison of Tissue Spray and Lipid Extract Direct Injection Electrospray Ionization Mass Spectrometry for the Differentiation of Eutopic and Ectopic Endometrial Tissues
Recent research revealed that tissue spray mass spectrometry enables rapid molecular profiling of biological tissues, which is of great importance for the search of disease biomarkers as well as for online sur...
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Article
Open AccessOn the chemistry of 1-pyrroline in solution and in the gas phase
1-Pyrroline has a highly characteristic odor, which is employed by living organisms for chemical signaling and other purposes, but the mechanism whereby this odor is formed remains poorly understood. Here we u...
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Article
Open AccessEndometriosis foci differentiation by rapid lipid profiling using tissue spray ionization and high resolution mass spectrometry
Obtaining fast screening information on molecular composition of a tissue sample is of great importance for a disease biomarkers search and for online surgery control. In this study, high resolution mass spect...
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Article
Preconcentration of organic solutes in urine by bubble bursting
The chemical sensitivity of urine metabolomics analysis is greatly compromised due to the large amounts of inorganic salts in urine (NaCl, KCl), which are detrimental to analytical instrumentation, e.g. chroma...
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Article
Open AccessTissue spray ionization mass spectrometry for rapid recognition of human lung squamous cell carcinoma
Tissue spray ionization mass spectrometry (TSI-MS) directly on small tissue samples has been shown to provide highly specific molecular information. In this study, we apply this method to the analysis of 38 pa...
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Article
Soft Supercharging of Biomolecular Ions in Electrospray Ionization Mass Spectrometry
The charge states of biomolecular ions in ESI-MS can be significantly increased by the addition of low-vapor supercharging (SC) reagents into the spraying solution. Despite the considerable interest from the c...
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Article
Simultaneous sampling of volatile and non-volatile analytes in beer for fast fingerprinting by extractive electrospray ionization mass spectrometry
By gently bubbling nitrogen gas through beer, an effervescent beverage, both volatile and non-volatile compounds can be simultaneously sampled in the form of aerosol. This allows for fast (within seconds) fing...
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Article
Sampling analytes from cheese products for fast detection using neutral desorption extractive electrospray ionization mass spectrometry
The development of analytical techniques suitable for sensitive, high-throughput, and nondestructive food analysis has been of increasing interest in recent years. In this study, mass-spectral fingerprints of ...
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Article
Fragmentation of benzylpyridinium “thermometer” ions and its effect on the accuracy of internal energy calibration
Electrospray ionization mass spectrometry (ESI-MS) is a powerful analytical method to study biomolecules and noncovalent complexes. The prerequisite for their intact observation is soft ionization. In ESI, the...
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Article
Exploring fluorescence and fragmentation of ions produced by electrospray ionization in ultrahigh vacuum
Fluorescence spectroscopy and mass spectrometry have been extensively used for characterization of biomaterials, but usually separately. An instrument combining fluorescence spectroscopy and Fourier-transform ...