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    Home > Chemicals Industry > Chemical Technology > Industrial Melamine (Appendix A Two)

    Industrial Melamine (Appendix A Two)

    • Last Update: 2021-11-17
    • Source: Internet
    • Author: User
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    A2 Chromaticity measurement

    A2.


    Put the sample into the colorimetric tube, and then compare the color with the Hazen standard solution


    A2.


    Colorimetric tube: a flat-bottomed glass tube with an inner diameter of about 23mm of the same quality and same diameter with a glass stopper.


    A2.


    a) Hazen standard solution: 1.


    b) A series of comparison solution, which is equivalent to the standard solution of color number 500 diluted and prepared according to the ratio of Table A1;

    Table A1 Hazen series comparison solution


    c) Take 100 mL of the series of comparison solutions and place them in a colorimetric tube, and store them in a dark place.


    A2.


    Put the colorimetric tube into which the sample in 5.


     

     

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