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    Home > Chemicals Industry > Chemical Technology > Check the amount of ethanol in Huoxiang Zhengqi Water

    Check the amount of ethanol in Huoxiang Zhengqi Water

    • Last Update: 2022-06-13
    • Source: Internet
    • Author: User
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    Huoxiang Zhengqi Water's Ethanol Amount Inspection (Gas Chromatography)

    test record

    Calibration factor determination: Precisely measure 4ml, 5ml, 6ml of absolute ethanol and place them in 100ml measuring flasks respectively.
    Precisely add 5ml of
    n-propanol (as internal standard substance) respectively, dilute with water to the mark, shake well, and measure 10ml respectively , Put them in a 50ml measuring flask, add water to dilute to the mark, shake well, take the above three solutions and inject 1ul respectively
    .

    Table 19-18 Gas Chromatography Determination of Huoxiang Zhengqi Water Ethanol Amount Correction Factor Test Results

    Preparation of the test solution: accurately measure 10ml of this product, place it in a 100ml measuring flask, add 5ml of n-propanol , add water to dilute to the mark, shake well, accurately measure 10ml, place it in a 50ml measuring bottle, add water to dilute to the mark , Shake well, and inject 1ul
    .

    Table 19-19 Gas Chromatography Determination of Huoxiang Zhengqi Water Ethanol Amount Test Results

    Result: 44%

    Standard stipulation: should be 40%~50%

    Huoxiang Zhengqi Water's Ethanol Amount Inspection (Distillation Method)

    test record

    Take the test product, shake well, adjust the temperature to 20℃, accurately measure 25ml, place it in a 250ml separatory funnel, add about 50ml of water, add sodium chloride to saturate it, and extract 3 times with petroleum ether , and divide the lower layer of water.
    , Distilled and determined

    .

    Balance model: CT225

    Unit: g

    Measuring method: distillation method

    Measuring temperature: 20℃

    Weight of empty pycnometer: 11.
    4960

    Weight of empty pycnometer plus test solution: 20.
    9395

    Weight of empty pycnometer with water: 21.
    1945

    Calculation formula

    Look up the relative density of the test product in the ethanol relative density table of 0.
    9737, and the corresponding concentration is 21.
    5 (%) (v/v).
    If the
    ethanol content is higher than 30%, the percentage of ethanol contained will be compared with 2 multiply
    .

    Ethanol content (%)=21.
    5%×2=43%

    Result: 43%

    Standard stipulation: should be 40%~50%

    Conclusion: meet the regulations

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