Da asked in 科學及數學化學 · 1 decade ago

如何測試肥皂與梘液在清潔效能上的差異??

如題!!

thx a lots!!

Update:

可以用中文嗎?thx a lot!!

1 Answer

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  • 1 decade ago
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    add equal volume of oil and water into each of several measuring cylinder

    add same volume of detergents of different brands into each respectively

    shake thoroughly and let them stand for minutes until emulsified layer is formed

    if emulsification is not effective, thin layer of water and oil are separated later

    compare the volume of miscible layer.

    error: random visual error due to the fact that boundary between layers is not sharp

    random error due to the incomplete emulsification

    Source(s): myself
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