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    Home > Chemicals Industry > Chemical Technology > Industrial antimony acetate (2)

    Industrial antimony acetate (2)

    • Last Update: 2021-10-16
    • Source: Internet
    • Author: User
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    4 Test method

    When the reagents and water used in this standard are not marked with other special requirements, the analytical reagents and the tertiary water specified in GB/T6682 shall be used


    The standard titration solutions, standard solutions for impurity determination, preparations and products used in this standard shall be prepared in accordance with GB/T601, GB/T602, and GB/T603 unless other requirements are indicated


    4.


    The sample is titrated with potassium bromate standard titration solution in an acid medium


    4.


    4.


    4.


    4.


    4.


    Weigh 0.


    Do a blank test at the same time


    4.


    Antimony content (X 1 ) expressed in mass percentage (calculated according to formula (1):


    Where: V 1 -the volume of the potassium bromate standard titration solution consumed by the sample, ml;

    V 0 —Blank consumption volume of potassium bromate standard titration solution, mL;

    c— The actual concentration of potassium bromate standard titration solution, mol/L;

    0.


    m—the mass of the sample, g


    4.


    Take the arithmetic average of the two measurement results as the measurement result
    .
    The difference between the two parallel determination results shall not be more than 0.
    2%
    .

    4.
    2 Determination of chloride

    4.
    2.
    1 Reagents and solutions

    4.
    2.
    1.
    1 Nitric acid solution: 1+7
    .

    4.
    2.
    1.
    2 Tartaric acid solution: 100g/L
    .

    4.
    2.
    1.
    3 Silver nitrate solution: c(AgNO 3 )=0.
    1mol/L
    .

    4.
    2.
    1.
    4 Chloride standard solution: 1ml solution contains 0.
    1mg C-
    .

    4.
    2.
    2 Analysis steps

    Weigh 0.
    2g sample (accurate to 0.
    01g), place it in a 50mL colorimetric tube, add 15mL tartaric acid solution to dissolve, add 1mL nitric acid solution, 3 drops of silver nitrate solution, add water to the mark, shake well, and place for 5min
    .
    Compared with the standard turbidity solution, the turbidity should not be greater than the turbidity of the standard turbidity solution
    .

    Standard turbidity solution: Take the chloride standard solution (0.
    04mL for superior product, 0.
    06mL for first-class product, and 0.
    2mL for qualified product), and process the same as the sample at the same time
    .

    4.
    3 Determination of iron

    4.
    3.
    1 Reagents and solutions

    4.
    3.
    1.
    1 Hydrochloric acid solution: 1+5
    .

    4.
    3.
    1.
    2 Hydrogen peroxide solution: 1+9
    .

    4.
    3.
    1.
    3 Ammonium thiocyanate solution: 100g/L
    .

    4.
    3.
    1.
    4 Tartaric acid solution: 100g/L
    .

    4.
    3.
    1.
    5 Iron standard solution: 1mL solution contains 0.
    1mg Fe
    .

    4.
    3.
    2 Analysis steps

    Weigh 0.
    2g sample (accurate to 0.
    01g), place it in a test tube, add 10mL tartaric acid solution to dissolve, add 1mL hydrochloric acid solution and 1ml hydrogen peroxide solution, heat to boiling, cool to room temperature and transfer it into a 50mL colorimetric tube.
    Add 1 mL of ammonium thiocyanate solution, add water to the mark, and mix well
    .
    The color should not be darker than the standard colorimetric solution
    .

    Standard colorimetric solution: Take the iron standard solution (0.
    04mL for superior product, 0.
    06mL for first-class product, and 0.
    1mL for qualified product), and process the same as the sample at the same time
    .

    4.
    4 Dissolution test

    4.
    4.
    1 Reagents

    Ethylene glycol
    .

    4.
    4.
    2 Analysis steps

    Weigh 0.
    3g of the sample (accurate to 0.
    01g), place it in a 25mL colorimetric tube, add 10mL of ethylene glycol , and shake it well until the sample is dissolved
    .
    Horizontal visual inspection, it should be a colorless and transparent solution
    .

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