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Vitamin C
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vitamin c and scurvy - coursework
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Scurvy – gums and tissues damaged repaired very fast , vitamin c deficiency prevents build up ofcollagen leads to damage of gums
OIL RIG
Oxidation reduction and the recipient becomes reduced. Exploring Vitamin C’s antioxidant
properties. Oxidation on the Vitamin C , reduction on some acceptor molecule e.g iodine.
Starch in the ascorbic acid . To find out how much iodine it takes for it to be neutralised. Titrate
iodine into the solution with ascorbic acid – still colourless. Keep doing it until solution turns blue.
Adding iodine to the apple juice with starch solution.
If less than 5% - effect occurring by chance
Analysis of variants
How to measure vitamin C concentration
Measuring the amount of a chemical can be achieved in many different ways such as its absorbance
of light (spectroscopy), molecular weight (mass spectrometry), chemical bond properties (nuclear
magnetic resonance), migration properties (chromatography) and its chemical activity. The last of
these (activity) can be seen to be an indirect measurement of concentration since it is assumed that
twice the concentration would produce twice the activity. This is the approach we will use today.
Specifically, we will measure the anti-oxidant activity of vitamin C. From here onwards we will get
technical and call vitamin C by its official chemical name, ascorbic acid (C6H8O6) – check out the
structure in the picture above. Here’s a bit of revision to refresh your memories on the properties of
reducing/oxidising (RedOx) reactions:
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