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maymay asked in 科學及數學化學 · 1 decade ago

20點,超重要!如何找出vitaminC在食物中的含量?

如何找出vitaminC在食物中的含量?

e.g在橙和維他命丸中!!

想要完整既實驗內容,包括:

1 ) 簡介

2 ) 原理

3 ) 操作方法

4 ) 計算方法

最好有英文!中文亦不拘~~

麻煩晒!

Update:

* 想要準確的含量,最好用滴定( titration )~~

3 Answers

Rating
  • 1 decade ago
    Favorite Answer

    We can use titration with known molarity of DCPIP solution(C12H7NCl2O2)

    equation : C6H8O6(Vit C) + C12H7NCl2O2(DCPIP) ----------> C6H6O6 + C12H9NCl2O2

    It will change from blue to pink color that persists for 10 seconds or more

    so you can calculate the moles of Vit C easily

    Source(s): wiki(equation) and some of my chemical knowledge
  • 1 decade ago

    you may use DCPIP solution

    the solution will change from deep blue to colourless when it reach the optimum vitamin C level

    less DCPIP solution is used means more vitamin C

  • 1 decade ago

    Vitamin C tablet is marked to contained 1000mg of vitaminC , just put it to the Chinese university to verify the exam. result is correct ness , it is only $ 3000 - $ 50000 each time depend on the clearance.

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