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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
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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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Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

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Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass.  One common type of ionization, known as electrospray ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave...
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Mass Spectrometers01:16

Mass Spectrometers

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This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
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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.
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Mass Analyzers: Overview01:13

Mass Analyzers: Overview

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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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Updated: May 12, 2025

Sample Preparation for Probe Electrospray Ionization Mass Spectrometry
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Onsite Analysis of Complex Samples Using Miniature Mass Spectrometry With Direct Sampling and Ionization.

Yiming Zou1, Xuan Liu2, Linzhi Du3

  • 1College of Chemistry and Materials, Jinan University, Guangzhou, China.

Rapid Communications in Mass Spectrometry : RCM
|May 9, 2025
PubMed
Summary
This summary is machine-generated.

A new wooden tip kit enables direct sampling and ionization for miniature mass spectrometry (mini-MS). This method offers a fast, sensitive, and reproducible approach for onsite analysis of diverse raw samples in field environments.

Keywords:
direct ionizationdirect sample analysisminiature mass spectrometryonsite analysiswooden‐tip ESI

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Area of Science:

  • Analytical Chemistry
  • Environmental Science

Background:

  • Miniature mass spectrometry (mini-MS) is crucial for onsite analysis of complex samples.
  • Effective onsite sampling and ionization are essential for rapid screening in field environments.
  • There is a need for direct sampling/ionization methods compatible with mini-MS.

Purpose of the Study:

  • To develop a direct sampling/ionization kit for miniature mass spectrometry.
  • To enable rapid, onsite analysis of complex raw samples.

Main Methods:

  • A direct sampling/ionization kit utilizing a wooden tip or plant tissue was developed.
  • The kit was coupled with mini-MS/MS for targeted analyte detection and identification.
  • Analytical performance was evaluated using pesticide detection in juice and direct tissue analysis.

Main Results:

  • The wooden tip kit successfully sampled and ionized various raw samples (powders, liquids, viscous).
  • Excellent sensitivity, reproducibility, and quantitation capacity were achieved for direct pesticide analysis in juice.
  • Direct ionization of biological tissue demonstrated a fast, simple, and efficient method.

Conclusions:

  • The developed direct sampling/ionization method using a wooden tip is simple, fast, and sensitive.
  • This approach is suitable for onsite direct analysis of raw samples in field settings.
  • The method enhances the applicability of mini-MS for field-based sample analysis.