Summary
Summary - Unit 1 - Lifestyle, Transport, Genes and Health
- Course
- Institution
Summary - Unit 1 - Lifestyle, Transport, Genes and Health
[Show more]
Seller
Follow
issabellaward
Content preview
vitamin c core practicalmeasuring the content of vitamin C in fruit juice
independent - types of fruit juice
dependent - volume of juice required to decolourise the 1cm^3
of DCPIP
variables to be controlled - concentration or DCPIP solution
(1%), same end point colour - until the blue colour of DCPIP just
about disappears, temperature
100mg per 100ml (1mg/ ml)
method:
• pipette 1cm blue DCPIP into test tube using burette (or
accurate pipette)
• add 1% vitamin C solution drop by drop. Shake tube gently
after each drop.
• continue until the blue colour just disappears. Record
volume of solution needed to decolourise the DCPIP.
• repeat further 2 times and calculate mean result.
• repeat procedure with different fruit juices.
• calculations: 1cm° of 1% vitamin C solution contains 10mg
Vitamin C, therefore mass in 1cm" = 10mg x volume of 1%
vitamin C to decolourise 1cm® of DCPIP.
• mass in sample = mass of vitamin C to decolourise 1cm^3
DCPIP volume of sample
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller issabellaward. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.24. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53068 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now