I need a little explaination on how to measure the relative quantities of Vit C in different citrus fruits (mandarin,Orange,kiwifruit,lemon)

What is the method of how this is done? by simple school labs of course

Can somebody please outline the procedures i use to do this?

I got a procedure to measure ascorbic acid (vit.c) it uses chemicals that weren't in our school lab but you would be able to get it http://www.zoo.utoronto.ca/able/volumes/vol-7/7-reiss.pdf

Cheers

Is indophenol or thyodene dangerous in anyway? flammable or explosive?

Do they go by any other names?

here is a very simple way using KIO3, KI, and starch.

 

http://cas.bellarmine.edu/chem117a/lab/vitamin_c.htm