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    Home > Chemicals Industry > Chemical Technology > Determination of trace water in industrial butadiene. Karl Fischer coulometric method (1)

    Determination of trace water in industrial butadiene. Karl Fischer coulometric method (1)

    • Last Update: 2022-01-13
    • Source: Internet
    • Author: User
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    1 Scope

    1.


    This standard is applicable to the determination of trace water in industrial butadiene and other carbon four olefins, and the determination range is (5~500) mg/kg


    1.


    2 Normative references

    The clauses in the following documents have become clauses of this standard after being quoted in this standard


    GB/T2366-1986 Determination of Moisture Content in Chemical Products Gas Chromatography

    GB/T8170 Numerical rounding rules

    GB/T13290 Industrial Propylene and Butadiene Liquid Sampling Method

    3 Method summary

    The sample to be tested is completely vaporized through a dedicated vaporization device.


    H 2 O+I 2 +SO 2 +CH 3 OH+3RN→(RNH)SO 4 CH 3 +2(RNH)I

    The consumed iodine is electrolytically supplemented by the anolyte containing iodide ions:

    2I - → the I 2 + 2E

    The amount of iodine required for the reaction is directly proportional to the amount of electricity passing through the electrolytic cell.


    4 Reagents and materials

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    11 Nitrogen: the purity (volume fraction) is not less than 99.
    995%
    .

     

     

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