Results 191 to 200 of about 376,084 (233)

Desorption Electrospray Ionization of Explosives on Surfaces:  Sensitivity and Selectivity Enhancement by Reactive Desorption Electrospray Ionization

Analytical Chemistry, 2005
Desorption electrospray ionization (DESI), an ambient mass spectrometry technique, is used for trace detection of the explosives trinitrohexahydro-1,3,5-triazine (RDX), octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX), 2,4,6-trinitrotoluene (TNT), Pentaerythritol tetranitrate (PETN), and their plastic compositions (Composition C-4, Semtex-H ...
Ismael, Cotte-Rodríguez, Zoltán, Takáts, Nari, Talaty, Huanwen, Chen, R Graham, Cooks   +4 more
openaire   +2 more sources

Ion suppression effect in desorption electrospray ionization and electrospray ionization mass spectrometry

Rapid Communications in Mass Spectrometry, 2017
Rationale Although it is claimed that desorption electrospray ionization (DESI) causes less ion suppression effects than electrospray ionization (ESI), a related investigation with quantification measurement of ion suppression effects is absent.
Zheng Wang, Haijing Zhu, Guangming Huang
openaire   +2 more sources

Electrode‐assisted desorption electrospray ionization mass spectrometry

Journal of Mass Spectrometry, 2010
AbstractA new ion source has been developed for rapid, noncontact analysis of materials at ambient conditions. The method provides desorption of analytes under ambient conditions directly from different surfaces with little or no sample preparation. The new method, termed electrode‐assisted desorption electrospray ionization (EADESI), is on the basis ...
Sakarya Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü, Özdemir, Abdil, Özdemir, Abdil   +2 more
openaire   +3 more sources

Desorption Electrospray Ionization in a Small Pressure-Tight Enclosure

Analytical Chemistry, 2007
Desorption electrospray ionization (DESI) is made easier to implement, more robust, and exposure of the analyst to the sample is reduced by a novel DESI interface. This features a small, pressure-tight enclosure with fixed spatial relationships between the sprayer, surface, and sampling capillary.
Andre, Venter, R Graham, Cooks
openaire   +2 more sources

Synchronized Desorption Electrospray Ionization Mass Spectrometry Imaging

Analytical Chemistry, 2015
Desorption electrospray ionization (DESI) has emerged as a powerful technique for mass spectral analysis and imaging under ambient conditions. Synchronization of DESI (sDESI) with the ion injection period (IT)of low-duty cycle mass spectrometers has been previously shown to improve sensitivity and reduce the amount of sample depleted during the ...
Comi, Troy J., Woo Ryu, Seung, Perry, Richard H.   +2 more
openaire   +3 more sources

Desorption electrospray ionization and matrix-assisted laser desorption/ionization as imaging approaches for biological samples analysis

Analytical and Bioanalytical Chemistry, 2023
The imaging of biological tissues can offer valuable information about the sample composition, which improves the understanding of analyte distribution in such complex samples. Different approaches using mass spectrometry imaging (MSI), also known as imaging mass spectrometry (IMS), enabled the visualization of the distribution of numerous metabolites,
Lanaia Ítala Louzeiro Maciel, Ricardo Alves Bernardo, Rafael Oliveira Martins, Almir Custodio Batista Junior, João Victor Ataíde Oliveira, Andréa Rodrigues Chaves, Boniek Gontijo Vaz   +6 more
openaire   +2 more sources

Desorption Electrospray Ionization: Achieving Rapid Sampling Rates

Analytical Chemistry, 2009
The sampling rate and imaging capabilities of desorption electrospray ionization (DESI) are examined using a rotating sample platform combined with Hadamard transform time-of-flight mass spectrometry (HTTOFMS), a multiplexed time-of-flight technique that allows for millisecond acquisition of full mass-to-charge ratio scans.
Griffin K, Barbula, Matthew D, Robbins, Oh Kyu, Yoon, Ignacio, Zuleta, Richard N, Zare   +4 more
openaire   +2 more sources

Probe-Substrate Distance Control in Desorption Electrospray Ionization

Journal of the American Society for Mass Spectrometry, 2017
We introduce probe-substrate distance (Dps)-control to desorption electrospray ionization (DESI) and report a systematic investigation of key experimental parameters. Examination of voltage, flow rate, and nebulizing gas pressure suggests as Dps decreases, the distance-dependent spray current increases, until a critical point. At the critical point the
Tyler J, Yarger, Elizabeth M, Yuill, Lane A, Baker   +2 more
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Desorption electrospray ionization mass spectrometry of intact bacteria

Journal of Mass Spectrometry, 2007
AbstractDesorption electrospray ionization (DESI) mass spectrometry (MS) was used to differentiate seven bacteria species on the basis of their measured DESI‐mass spectral profile. Both gram‐positive and gram‐negative bacteria were tested and included Escherichia coli, Staphyloccocus aureus, Enterococcus sp., Bordetella bronchiseptica, Bacillus ...
Mohammed A, Meetani, Yong-Seung, Shin, Shaofeng, Zhang, Richard, Mayer, Franco, Basile   +4 more
openaire   +2 more sources

Droplet Dynamics and Ionization Mechanisms in Desorption Electrospray Ionization Mass Spectrometry

Analytical Chemistry, 2006
A droplet pickup and other mechanisms have been suggested for the ionization of biomolecules like peptides and proteins by desorption electrospray ionization. To verify this hypothesis phase Doppler particle analysis was used to study the sizes and velocities of droplets involved in DESI.
Andre, Venter, Paul E, Sojka, R Graham, Cooks   +2 more
openaire   +2 more sources