Related Experiment Video
Updated: Apr 26, 2026
08:40
Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments
Published on: January 20, 2022
3.8K
Automated deconvolution of overlapped ion mobility profiles
Matthew Brantley1, Behrooz Zekavat, Brett Harper
1Department of Chemistry and Biochemistry, University of Texas at Tyler, Tyler, TX, 75799, USA.
Journal of the American Society for Mass Spectrometry
|August 7, 2014
Summary
Automated ion mobility deconvolution (AIMD) software streamlines the analysis of complex ion mobility mass spectrometry data. This new tool efficiently deconvolutes overlapped profiles, improving isomer differentiation in scientific research.
Area of Science:
- Analytical Chemistry
- Biophysical Chemistry
- Separation Science
Background:
- Unresolved ion mobility (IM) profiles hinder isomer differentiation in IM mass spectrometry (IM-MS).
- Efficiently deconvoluting overlapped IM-MS profiles is crucial for advancing isomer analysis.
- Current manual methods for deconvolution are time-consuming and require data resampling.
Purpose of the Study:
- To introduce automated ion mobility deconvolution (AIMD) computer software.
- To enable streamlined deconvolution of overlapped IM-MS profiles.
- To improve the accuracy and efficiency of isomer differentiation using IM-MS.
Main Methods:
- Development of automated ion mobility deconvolution (AIMD) software.
- Implementation of a novel data preprocessing approach for enhanced accuracy.
- Utilizing a post-IM/collision-induced dissociation (CID) deconvolution strategy.
Main Results:
- AIMD successfully deconvoluted overlapped IM profiles from isomeric peptides (GRGDS and SDGRG).
- AIMD demonstrated effectiveness on isomeric trisaccharides (raffinose and isomaltotriose) using Waters Synapt G2-S.
- The software provides a streamlined and efficient alternative to manual deconvolution methods.
Conclusions:
- AIMD software offers a significant advancement for isomer differentiation in IM-MS.
- The automated approach enhances the utility of IM-MS systems for complex mixture analysis.
- AIMD facilitates more efficient and accurate analysis of isomeric compounds.
More Related Videos
Related Concept Videos
01:02¹H NMR: Interpreting Distorted and Overlapping Signals
1.3K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.3K
01:04¹³C NMR: ¹H–¹³C Decoupling
1.7K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.7K
01:20¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
1.3K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.3K
01:24Mass Spectrum: Interpretation
4.1K
An unknown compound can be established by identifying the molecular ion peak in the mass spectrum. The molecular ion peak is often weak or absent due to the predominance of fragmentation in high-energy electron beams. In such cases, a soft-energy electron beam can be used to scan the spectrum to enhance the intensity of the molecular ion peak. Additionally, chemical ionization, field ionization, and desorption ionization spectra are used to obtain a relatively intense molecular ion peak.To...
4.1K
01:21Tandem Mass Spectrometry
3.0K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
3.0K
01:19MALDI-TOF Mass Spectrometry
5.7K
Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
5.7K