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Related Concept Videos

Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
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Chemical Ionization (CI) Mass Spectrometry01:21

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The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

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Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
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Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

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Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
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Sample Preparation for Probe Electrospray Ionization Mass Spectrometry
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Generating Electrospray Ionization on Ballpoint Tips.

Baocheng Ji1, Bing Xia1, Yuanji Gao1

  • 1Chengdu Institute of Biology , Chinese Academy of Sciences, Chengdu 610041, People's Republic of China.

Analytical Chemistry
|April 26, 2016
PubMed
Summary

A new ballpoint electrospray ionization mass spectrometry (BP-ESI-MS) method offers efficient, low-sample-consumption analysis of diverse sample types. This technique simplifies direct surface sampling and analysis with minimal sample preparation.

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Area of Science:

  • Analytical Chemistry
  • Mass Spectrometry
  • Surface Analysis

Background:

  • Conventional electrospray ionization mass spectrometry (ESI-MS) often requires extensive sample preparation and specialized equipment.
  • Direct analysis of solid and semi-solid samples remains challenging, limiting the scope of traditional ESI-MS applications.
  • Developing cost-effective and versatile ionization techniques is crucial for broader MS accessibility.

Purpose of the Study:

  • To introduce a novel, economical ballpoint electrospray ionization mass spectrometry (BP-ESI-MS) technique.
  • To demonstrate the capability of BP-ESI-MS for direct analysis of samples in various phases (solution, semi-solid, solid).
  • To highlight the utility of BP-ESI-MS for surface analysis and complex sample handling with minimal preparation.

Main Methods:

  • Utilized a ballpoint tip integrated with a syringe pump for sample loading and ionization.
  • Employed the unique physical properties of the ballpoint tip for direct surface sampling (penetration/scraping).
  • Investigated the storage and online extraction of complex samples within the ballpoint socket for simplified MS analysis.

Main Results:

  • Achieved higher ionization efficiency and reduced sample consumption compared to conventional sharp tips due to the larger surface area of the ballpoint.
  • Successfully analyzed diverse sample types including fruit peels, paper, fabric, herbal powders, and small solid samples.
  • Detected various compounds such as amino acids, carbohydrates, flavonoids, and alkaloids using positive ion mode.

Conclusions:

  • The ballpoint electrospray ionization mass spectrometry (BP-ESI-MS) technique provides a fast, convenient, and economical approach for MS analysis.
  • BP-ESI-MS facilitates direct sampling and ionization from various surfaces and sample phases with minimal sample preparation.
  • The method's versatility and efficiency make it suitable for a wide range of analytical chemistry applications.