Laser desorption/ionization determination of molecular weight ...
2007.5.30 Abstract Molecular weight distributions (MWDs) of model polyaromatic hydrocarbons (PAHs) and complex asphaltene samples have been investigated in laser desorption/ionization mass spectrometry (LDI–...
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Novel Ag-modified vanadate nanosheets for determination of
Laser desorption ionization mass spectrometry (LDI-MS) aroused intensive concerns for the merits of label-free and high-throughput analysis. Here, we designed a silver
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Laser desorption/ionization determination of molecular weight ...
2007.5.30 Molecular weight distributions (MWDs) of model polyaromatic hydrocarbons (PAHs) and complex asphaltene samples have been investigated in laser
MoreLaser desorption/ionization determination of molecular weight ...
2007.5.30 Molecular weight distributions (MWDs) of model polyaromatic hydrocarbons (PAHs) and complex asphaltene samples have been investigated in laser
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Determination of Environmental Micro(Nano)Plastics by Matrix
2020.11.3 This study provides a novel method for MNPs identification/quantification by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI
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Temporally and spatially resolved molecular profiling in fingerprint ...
2023.12.10 This study presents the first-ever synthesis of samarium-doped indium vanadate nanosheets (IVONSs:Sm) via microemulsion-mediated solvothermal method.
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Determination of Environmental Micro(Nano)Plastics by Matrix
This study provides a novel method for MNPs identification/quantification by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF MS). Factors
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Determination of Environmental Micro(Nano)Plastics by Matrix
2020.9.17 This study provides a novel method for MNPs identification/quantification by matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI
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Covalent Organic Framework Nanofilm-Based Laser
2021.11.16 Au@BN-enhanced laser desorption/ionization mass spectrometry and imaging for determination of fipronil and its metabolites in food and biological samples.
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ORIGIN: a novel and compact Laser Desorption - Nature
2020.6.15 Here we report on a novel analytical technique for the detection of extremely low concentrations of amino acids using ORIGIN, a compact and lightweight
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A magnetic covalent organic framework as an adsorbent and a
2019.2.26 A magnetic covalent organic framework nanomaterial (Fe 3 O 4 @COFs) served as an adsorbent for enrichment and a new matrix for SALDI-TOF-MS analysis of PAHs and their derivatives in PM 2.5.The unique properties of Fe 3 O 4 @COFs in terms of high enrichment ability and matrix-free interference made it possible for sensitive
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Laser desorption/ionization determination of molecular weight ...
2007.5.30 Laser desorption/ionization determination of molecular weight distributions of polyaromatic carbonaceous compounds and their aggregates. Bruno Martínez-Haya, ... Aggregation is favoured in the experiments performed on dense samples at high laser energy and under continuous ion extraction conditions.
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Laser desorption ionization of proteins with molecular masses exceeding ...
In the following, the first results on ultraviolet laser desorption (UVLD) of bioorganic compounds in the mass range above 10000 daltons are reported. In the following, the first results on ultraviolet laser desorption (UVLD) of bioorganic compounds in the mass range above 10000 daltons are reported. Strong molecular ion signals were registered by use
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Determination of molecular weights of caprine milk proteins by
Molecular weights (MW) of major proteins in milk of 3 Korean dairy goat breeds were determined by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, after treatment of milk samples with the reduction buffer used in capillary electrophoresis. The MW of caprine milk proteins
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Matrix-assisted laser desorption/ionization - Wikipedia
The term matrix-assisted laser desorption ionization (MALDI) was coined in 1985 by Franz Hillenkamp, Michael Karas and their colleagues. These researchers found that the amino acid alanine could be ionized more easily if it was mixed with the amino acid tryptophan and irradiated with a pulsed 266 nm laser. The tryptophan was absorbing the
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Covalent Organic Framework Nanofilm-Based Laser Desorption/Ionization ...
2021.11.16 Although matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) has become a ubiquitous and effective tool for macromolecules, direct analysis of small molecules by MALDI-MS using conventional organic matrices poses a challenge. Herein, a large-area, uniform, and stable covalent organic framework (COF) nanofilm
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Laser desorption ionization mass spectrometry: Recent progress
2017.10.13 It is a gentle ionization technique, usually applicable to detect and characterize analytes with high molecular weights like proteins and other macromolecules. The earlier difficulty of detection of analytes with low molecular weights like small organic molecules and metal ion complexes with this technique arose due to the cluster of peaks
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Au@BN-enhanced laser desorption/ionization mass
2023.3.23 Gold nanoparticles (AuNPs) represent an attractive inorganic matrix for laser desorption/ionization mass spectrometry (LDI-MS) detection of low-molecular-weight analytes; however, their direct use is hindered by severe aggregation. To limit AuNPs aggregation, hexagonal boron nitride nanosheets (h-BN
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Determination of environmental micro-(nano-)plastics by
2020.9.3 Laser Desorption/Ionization-Time of Flight Ma ss Spectrometry Pengfei Wu 1,2,3 , Yuanyuan Tang 1,3* , Guodong Cao 2 , Jiangpeng L i 1,3 , Siqing Wang 1,3 ,
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Nanomaterials as Assisted Matrix of Laser
2017.4.21 Matrix-assisted laser desorption/ionization (MALDI), a soft ionization method, coupling with time-of-flight mass spectrometry (TOF MS) has become an indispensible tool for analyzing
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Black phosphorus-assisted laser desorption ionization mass
Quantitative analysis of small molecules by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry ... In this study, we developed an app Black phosphorus-assisted laser desorption ionization mass spectrometry for the determination of low-molecular-weight compounds in biofluids Anal Bioanal Chem. 2016 Sep ...
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Quantitative Analysis of Immunosuppressive Drugs
Recently, matrix-assisted (MA) laser desorption ionization (LDI)-MS has been widely adopted in hospitals for the identification of pathogenic microbes, the determination of antimicrobial susceptibility, and
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Determination of beta-lactamase residues in milk using matrix
2010.3.1 A selective, fast, and effective enzyme assay based on matrix-assisted laser desorption/ionization Fourier transform mass spectrometry (MALDI-FTMS) for quantifying beta-lactamase, an illegal additive in milk products, has been reported. The strengths of the mass spectrometric assay are its response
MoreSynthesis of Magnetic Microspheres with Immobilized Metal Ions
2006.12.18 Peptide mass mapping analysis, utilizing a regenerable enzyme microreactor with metal‐ion chelated adsorption of enzyme, combined with matrix assisted laser desorption/ionization‐time of flight‐mass spectrometry (MALDI‐TOF‐MS) was developed and revealed that the peptide mapping could routinely be generated from 0.5
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Determination of Environmental Micro(Nano)Plastics by Matrix
2020.9.17 Determination of Environmental Micro(Nano)Plastics by Matrix-Assisted Laser Desorption/Ionization-Time-of-Flight Mass Spectrometry. ... (MNPs) are widely acknowledged as global environmental threat while determination methods for MNPs are still lacking and becoming a growing concern.
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Au@BN-enhanced laser desorption/ionization mass
2023.8.30 For the past few years, matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) has emerged as a favourable technique to detect small molecules in various substances (Dreisbach et al., 2022, Muller et al., 2022, Hahm et al., 2022), and also meets the requirements of high-throughput tests (Huang et al., 2020, Shanta et al.,
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Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry ...
1997.11.1 Label-assisted laser desorption/ionization mass spectrometry (LA-LDI-MS): use of pyrene aldehyde for detection of biogenic amines, amino acids and peptides. RSC Advances 2015 , 5 (129) , 106912-106917.
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Negative Ion Laser Desorption/Ionization Time-of-Flight Mass ...
Ultrathin graphitic carbon nitride (g-C 3 N 4) nanosheets served as a novel matrix for the detection of small molecules by negative ion matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) was described for the first time.In comparison with conventional organic matrices and graphene matrix, the use of g-C 3 N
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ORIGIN: a novel and compact Laser Desorption - Nature
2020.6.15 Laser Desorption Ionization Mass Spectrometry ... Mineralogical determination in situ of a highly heterogeneous material using a miniaturized laser ablation mass spectrometer with high spatial ...
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