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    Home > Chemicals Industry > Chemical Technology > Tetraethylene for industrial use (5)

    Tetraethylene for industrial use (5)

    • Last Update: 2021-11-24
    • Source: Internet
    • Author: User
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    4.
    8 Determination of residual odor

    4.
    8.
    1 Method summary

    Compare the filter paper soaked by the sample with the blank filter paper to check for foreign odors
    .

    4.
    8.
    2 Reagents and materials

    Filter paper: meet the requirements of GB/T1914
    .

    4.
    8.
    3 Analysis steps

    4.
    8.
    3.
    1 Take a 200mL sample and place it in a 500mL beaker, and immerse the filter paper cut into a size of 2.
    5cm×7.
    5cm into the sample 5cm deep

    .

    4.
    8.
    3.
    2 Take out the filter paper, place it at room temperature for 30 minutes, and then dry it in a constant temperature drying oven at (60±2)°C for 30 minutes

    .

    4.
    8.
    3.
    3 Take out the filter paper and place it at room temperature for 5 minutes

    .

    4.
    8.
    3.
    4 Compare the filter paper processed by the above steps and the filter paper processed only in steps 4.
    8.
    3.
    2 and 4.
    8.
    3.
    3 at the same time.
    There should be no foreign smell

    .

    5 Inspection rules

    5.
    1 All items specified in this standard are type inspection items, of which chromaticity, density, purity, moisture, and alkalinity are factory inspection items.
    Under normal production conditions, type inspection shall be carried out at least once every three months

    .

    5.
    2
    The quality inspection department of the in-house production plant for industrial
    tetrachloroethylene conducts inspection.
    Each batch of products shipped out of the factory should meet the requirements of this standard

    .
    Each batch of products should be accompanied by a quality certificate in a certain format, which includes the product name, grade, manufacturer name, factory address, batch number or production date and the number of this standard

    .

    5.
    3
    Tetrachloroethylene for industrial use is based on the production volume per shift
    .

    5.
    4 Determine the number of sampling units according to 6.
    6 of GB/T6678-1986, and the sampling technology should meet the requirements of GB/T6680

    .
    The sampling volume is not less than 200mL.
    After mixing the sampled products, put them into two clean, dry stoppered bottles, label them and indicate the product name, product grade, batch number, sampling date and sampler Name

    .
    One bottle is for inspection, and the other bottle is sealed and kept for six months for future reference

    .

    5.
    5 The test result is judged according to the rounding value comparison method in GB/T1250

    .
    If one of the inspection results does not meet the requirements of this standard, double the number of packaging units should be sampled for re-inspection.
    Even if only one indicator does not meet the requirements of this standard, the entire batch of products will be unqualified.

    .

    6 Marking, packaging, transportation and storage

    Industrial tetrachlorethylene the barrel drum packaging net weight (300 ± 0.
    5) kg, packaged, or according to user needs

    .
    Other requirements for the marking, packaging, transportation and storage of industrial tetrachloroethylene shall be implemented in accordance with the requirements for marking, packaging, transportation and storage in GB/T4120.
    6

    .

    7 Security

    Industrial tetrachloroethylene has a special pungent odor, which liberates toxic gases when exposed to high heat or combustion.
    In places where the concentration of tetrachloroethylene vapor is high, a gas mask should be worn

    .
    Perchloroethylene has strong degreasing ability and is irritating to eyes, mucous membranes or skin, and there is a risk of burns.
    Avoid contact with skin

    .
    If you must touch perchloroethylene during operation, you can wear plastic-coated gloves for protection

    .

    Related Links: Tetraethylene for Industrial Use (4)

     

     

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