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Related Concept Videos

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

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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...
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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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[Identification of two interference peaks during dioxin analysis for biological samples].

Daiwei Ren, Tao Liang, Gang Li

    Se Pu = Chinese Journal of Chromatography
    |March 11, 2015
    PubMed
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    Interference peaks in dioxin analysis were identified as dichlorodiphenyldichloroethylene (DDE) isomers. This finding improves the accuracy of identifying dioxins in biological samples using HRGC/HRMS and HRGC/LRMS.

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    Area of Science:

    • Environmental Chemistry
    • Analytical Chemistry

    Background:

    • Dioxin analysis in biological samples can be complicated by interfering peaks.
    • Accurate identification of target compounds is crucial for environmental monitoring and risk assessment.

    Purpose of the Study:

    • To identify two common interference peaks observed during dioxin analysis.
    • To confirm the identity of these interfering compounds using advanced analytical techniques.

    Main Methods:

    • High resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS).
    • High resolution gas chromatography/low resolution mass spectrometry (HRGC/LRMS).
    • Analysis of standard solutions of dichlorodiphenyldichloroethylene (DDE) isomers (o,p'-DDE and p,p'-DDE).

    Main Results:

    • Two interference peaks were identified as o,p'-DDE and p,p'-DDE.
    • Confirmation was achieved by comparing GC retention times and ion abundance ratios with DDE standards.
    • The order of elution on a DB-5MS column was determined.

    Conclusions:

    • The interference peaks in dioxin analysis of biological samples are confirmed to be o,p'-DDE and p,p'-DDE.
    • This identification enhances the reliability of dioxin analysis.
    • Provides critical information for accurate dioxin compound identification.