Related Experiment Video

Updated: Aug 15, 2026

Fast and Accurate Exhaled Breath Ammonia Measurement
06:27

Fast and Accurate Exhaled Breath Ammonia Measurement

Published on: June 11, 2014

Real-time analysis of breath using an atmospheric pressure ionization mass spectrometer

A M Lovett, N M Reid, J A Buckley

    Biomedical Mass Spectrometry
    |March 1, 1979
    PubMed

    More Related Videos

    Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry08:23

    Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry

    Published on: March 9, 2018

    Breath Collection from Children for Disease Biomarker Discovery06:09

    Breath Collection from Children for Disease Biomarker Discovery

    Published on: February 14, 2019

    Related Concept Videos

    Chemical Ionization (CI) Mass Spectrometry01:21

    Chemical Ionization (CI) Mass Spectrometry

    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...
    Mass Spectrometers01:16

    Mass Spectrometers

    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:
    Mass Spectrum: Interpretation01:24

    Mass Spectrum: Interpretation

    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...
    Mass Spectrometry: Complex Analysis01:21

    Mass Spectrometry: Complex Analysis

    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...
    Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

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

    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 passed on to...
    Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

    Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

    Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and refractory oxide ion...