Vitamin C content using a redox titration

Vitamin C content using a redox titration

The term vitamin C refers to dehydroascorbic acid and ascorbic acid as both exhibit anti-scorbutic activities . It is a water soluble vitamin . Human body cannot synthesize vitamin C , so it should be supplemented through the diet

1 ) Vitamin C content of appropriate substances

Vitamin C is supplied through our diet by animal and plant sources . But the richest sources are fruits and vegetables . Highest concentration is present in kakadu pulm and cammu camu fruit . In liver of animals also it is present in

good amounts

PLANT SOURCES

The following are the sources ant their amooount of vitamin C present . The amount is given in milligrams per hundred grams of fruits or vegetables

Kakadu pulm---------------- 3100

Cammu cammu---------------2000

Rose hip------------------------2000

Acerola------------------------1600

Seabuckthorn-----------------695

Jujube--------------------------500

Indian gooseberry----------445

Baobab-----------------------400

Red pepper-----------------190

Papaya----------------------60

Strawberry-----------------60

Orange----------------------50

Lemon---------------------40

Mango--------------------28

Potato------------------20

ANIMAL SOURCE

Goats are the highest source of vit C in animals

The list below is given for milligrams for 100 grams of food

Calf liver---------------36

Beef liver-------------31

Oysters--------------30

Cod roe .26

Pork-----------------23

Lamb brain--------17

Chicken liver ------13

Human milk .-------4

Cow milk---------2

2 ) Commercial methods of vitamin C determination :-

Determination of vitamin C BY analytical voltammetry----

This is an electrochemical method . Here the changes in the electrolysis current are observed when a gradually increasing voltage is applied to the cell . The figure below shows the setup of this

The quantity of the electricity involved in the oxidation peak is directly proportional to the concentration of ascorbic acid , so...