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    Sciencefreak's Avatar
    Sciencefreak Posts: 1, Reputation: 1
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    #1

    Jan 15, 2009, 08:07 AM
    Vitamin C
    How do you determine the amount of vitamin c present in a fruit juice sample?
    JSingle911's Avatar
    JSingle911 Posts: 35, Reputation: 8
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    #2

    Jan 15, 2009, 08:14 AM

    Well, the simple answer is to find out what percentage of real juice is in the juice you have, then if the manufacturer fortified it with more Vit C.

    If you're talking about lab tests, I have no clue.
    asking's Avatar
    asking Posts: 2,673, Reputation: 660
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    #3

    Jan 15, 2009, 11:54 AM

    You can look it up in nutrition tables.

    For example: Nutrition Fact Sheet: Vitamin C, Nutrition, Feinberg School of Medicine

    This isn't very comprehensive, but you get the idea.
    Google "nutrition tables" or "vitamin C content".
    jem02081's Avatar
    jem02081 Posts: 65, Reputation: 19
    Junior Member
    		  
    #4

    Jan 15, 2009, 09:43 PM
    Did you want a method?

    You can look in Food Analysis Laboratory Manual by S. Suzanne Nielsen (available for free @ books.google.com) for the “official method” for measuring vit C in fruit juices (p47).
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