Comments on: How can you know the fruit that contains the most vitamin c?

By: pggirl

pggirl — Fri, 23 Oct 2009 05:29:59 +0000

Actually, you need to do what is called an iodometric titration. Essentially, this is how it works: When you combine iodine and starch (I use cornstarch), it reacts to form a purple color. However, when Vitamin C is present, the purple color will not appear. So you keep adding the iodine solution until the purple DOES appear, indicating that all of the Vitamin C has been "used up." I teach high school, and I have my kids do this every year. I do not have the exact "recipe" for the iodine solution here at home, however, you can surely search IODOMETRIC TITRATION, and find it.
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By: Aseel

Aseel — Fri, 23 Oct 2009 04:52:59 +0000

While plants are generally a good source of vitamin C, the amount in foods of plant origin depends on: the precise variety of the plant, the soil condition, the climate in which it grew, the length of time since it was picked, the storage conditions, and the method of preparation.
Plant source Amount
(mg / 100g)
Kakadu plum 3150
Camu Camu 2800
Rose hip 2000
Acerola 1600
Amla 720
Jujube 500
Baobab 400
Blackcurrant 200
Red pepper 190
Parsley 130
Seabuckthorn 120
Guava 100
Kiwifruit 90
Broccoli 90
Loganberry 80
Redcurrant 80
Brussels sprouts 80
Lychee 70
Cloudberry 60
Persimmon 60
Papaya 60
Strawberry 60
Orange 50
Lemon 40
Melon, cantaloupe 40
Cauliflower 40
Grapefruit 30
Raspberry 30
Tangerine 30
Mandarin orange 30
Passion fruit 30
Spinach 30
Cabbage raw green 30
Lime 20
Mango 20
Potato 20
Melon, honeydew 20
Mango 16
Tomato 10
Blueberry 10
Pineapple 10
Pawpaw 10
Grape 10
Apricot 10
Plum 10
Watermelon 10
Banana 9
Carrot 9
Avocado 8
Crabapple 8
Cherry 7
Peach 7
Apple 6
Blackberry 6
Beetroot 5
Pear 4
Lettuce 4
Cucumber 3
Eggplant 2
Fig 2
Bilberry 1
Horned melon 0.5
Medlar 0.3
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By: Cheerleader!

Cheerleader! — Fri, 23 Oct 2009 04:09:59 +0000

Acid-based tiltration will allow you to detect the presence (or absence) of vitamic C... You can carry out this procedure to fruits and even food products!
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By: giallastar

giallastar — Fri, 23 Oct 2009 03:36:59 +0000

kiwis
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By: bobroberts01

bobroberts01 — Fri, 23 Oct 2009 03:13:59 +0000

I did this with juices a few years ago. I don't exactly remember the procedure, but we did an acid-base titration and found out that Capri Sun did not contain any ascorbic acid (vitamin c). (As a side note, the label on Capri Sun now states that it is fortified with vitamin c)
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By: ?Rae? NYPD

?Rae? NYPD — Fri, 23 Oct 2009 02:37:59 +0000

Lemon, orange juice and grapefruit
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By: Nicki

Nicki — Fri, 23 Oct 2009 02:01:59 +0000

I know oranges contain alot but I dont know if its the most out of all fruits
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