Mass Spectra Analysis
Mass Spectra Analysis - Related Videos
02:39
Emission Spectra
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2020
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present. In contrast to continuous spectra, light can also occur as discrete or line spectra having very narrow linewidths interspersed throughout the spectral regions. Exciting a gas at low partial pressure using an electrical current,...
10:23
Lipid Droplet Isolation for Quantitative Mass Spectrometry Analysis
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Cited by 7 •
2017
Lipid droplets are important organelles for the replication of several pathogens, including the Hepatitis C Virus (HCV). We describe a method to isolate lipid droplets for quantitative mass spectrometry of associated proteins; it can be used under a variety of conditions, such as virus infection, environmental stress, or drug treatment.
08:19
Direct Analysis of Single Cells by Mass Spectrometry at Atmospheric Pressure
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Cited by 17 •
2010
Single cell analysis is performed by mass spectrometry on plant and animal cells at atmospheric pressure by using a sharpened optical fiber to sample the cells for laser ablation electrospray ionization (LAESI) mass spectrometry.
09:40
Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
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Cited by 9 •
2014
Time-resolved atomic and diatomic molecular species are measured using LIBS. The spectra are collected at various time delays following the generation of optical breakdown plasma with Nd:YAG laser radiation and are analyzed to infer electron density and temperature.
13:09
Mass Spectrometric Analysis of Glycosphingolipid Antigens
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Cited by 9 •
2013
A specific and sensitive method to gain insight into the expression profile of glycosphingolipid antigens in immune organs and cells is described. The method takes advantage of the ion trap mass spectrometry allowing step-wise fragmentation of glycosphingolipid molecules for structural analysis in comparison to chemically synthesized standards.
FAQs
Analysis begins by converting the sample into gas-phase ions. The instrument then separates those ions according to their mass-to-charge ratios and records their signals as peaks. This sequence matters because the resulting pattern preserves information about the substance’s molecular mass and composition, while also creating the basis for interpreting structural features from ion fragments.
Fragmentation adds structural information beyond molecular mass. As ions break into smaller charged pieces, the resulting collection of peaks forms a fragmentation pattern associated with the substance. Chemists interpret that pattern alongside other spectral signals to assess structural features and help distinguish or characterize compounds whose overall molecular masses alone provide limited information.
Peak positions provide the mass-to-charge information used to organize the spectrum, while the overall pattern supplies a broader chemical signature. Chemists examine these signals with fragmentation data to determine molecular mass and composition, then use the combined evidence to evaluate structural features or identify an unknown substance.
A practical interpretation starts with the recorded peaks and their mass-to-charge relationships. Chemists use this spectral evidence to assess molecular mass and composition, then examine fragmentation patterns for structural clues. Depending on the investigation, the interpretation can support identification of an unknown compound, verification of a molecular formula, or characterization of a reaction product.
Combining mass spectra analysis with chromatography supports the examination of substances present in complex mixtures. The paired approach provides analytical information that can aid detection and identification when a sample contains more than one chemical substance. This makes the combination relevant to applications such as environmental testing, metabolomics, pharmaceuticals, and forensic science.
Chemists apply the technique to several distinct problems: identifying unknown compounds, verifying molecular formulas, characterizing products formed in reactions, and detecting substances within complex mixtures. These uses connect spectral interpretation to both routine chemical analysis and research, particularly when molecular composition and structural features must be assessed from the same experimental data.
Its applications extend across organic chemistry, pharmaceutical research, environmental testing, metabolomics, and forensic science. In these settings, the data can support compound identification, product characterization, or detection of specific substances. The chemistry context is especially important because the same spectral evidence can address composition, molecular mass, and structural features in different research questions.