便當 asked in 科學化學 · 6 years ago

ppb和ppm換算成密度怎麼用呢

例如 5ppb = ?? g/liter

5ppm= ?? g/liter

3 Answers

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  • Favorite Answer

    ppm=每克樣品中幾微克

    10^6微克=1g

    5ppm=(5*10^-6g/1g)

    (5*10^-6g/1g) * (g/mL) * (1000mL/L) = 0.005 * 比重 (g/mL) = 5*10^-3 * 比重 (g/mL)

    -->最後單位g/liter

    5ppb=(5*10^-9g/1g)

    (5*10^-9g/1g)*(g/mL)*(1000mL/L) = 5*10^-6 * 比重 (g/mL)

    -->最後單位g/liter

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    6 years ago

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  • TEKA
    Lv 7
    6 years ago

    ppd=part per billion 1000000000 九個零

    ppm=part per million 百萬分之一的意思 1000000=10的六次方

    5ppm=5g/1000000 L=5000mg/1000000000ml=5mg/1000000ml=

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