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    Home > Chemicals Industry > Chemical Technology > Brief introduction of large-scale instrument analysis method-gas chromatography (2)

    Brief introduction of large-scale instrument analysis method-gas chromatography (2)

    • Last Update: 2021-09-21
    • Source: Internet
    • Author: User
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    (5) Detector


    1) Hydrogen flame detector


    2) Electron capture detector


    3) Flame photometric detector


    No matter what kind of detector is used, it must be clean and moisture-proof, and must not be contaminated with organic matter


    (6) Gas chromatography quantitative method


    However, chromatographic quantification is its advantage, especially the quantitative analysis of multiple components without pre-separation is unmatched by other methods


    Chromatographic quantitative methods include calibration area normalization method, internal standard method and external standard method


    1) Corrected area normalization method


    2) Internal standard method


    The internal standard required in the internal standard method does not chemically react with the components in the sample, but has good solubility; the internal standard should have a peak near the component to be tested, but does not produce a peak; it should be determined in advance.


    3) External standard method


    (7) The application of gas chromatography in water quality analysis


    Water quality workers in the urban water supply industry in China began to study and explore the detection methods of gas chromatography in water quality analysis since the 1970s


    Related Links: Introduction to Analysis Methods of Large-scale Instruments-Gas Chromatography (1)

     

     

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