Determine the physical characteristics and presence of any additives in the given samples of milk.

After undertaking this activity, you will be able to:

• identify the physical characteristics of milk,

• determine any additives present in milk, and

• distinguish between synthetic milk and pure milk.

Principle

The principle is discussed in sub-section 5.3.4 of this practical. We suggest you look up the sub-section once again and write the principle here in the space provided.

Materials Required

1) Sample of milk

2) Iodine solution

3) 0.01% alcoholic solution of rosalic acid

4) Resorcinol solution (0.05 g resorcinol in 100 ml of dilute HCl (1:2)

5) DAMB solution- dissolve 0.4 g of p-dimethyl amino benzaldehyde in 250 ml alcohol and add 23 ml of conc. HCl

6) pH strip prepared with phenol red

7) 95% alcohol