Materials:

Solution I (1% Compound "A" (m/v); M.W. 250g/mole)

Solution II ( 1.5 M Compound "B" M.W. 480 g/mole: Density of compound "B": 1.6g/mL)

Method:

1. Prepare 1mL of each of the following solutions from the above stock solutions.

a. A 0.2mM solution of compound "A".

b. A 0.72%(m/v) solution of compound "B"

c. A 5% (v/v) solution of solution I.

d. A solution containing 0.1mg of compound "A" and 0.1% (v/v) of compound "B".

e. A solution with the following ratio: solution 1 : solution II : water: 2 : 1: 247