Apparatus :

1Test Tube
1 COLORIMETER

Reagents :

Reagent HZ-1
Reagent HZ-2

Procedure :

1. Take 5 ml of the sample to be tested in the Test tube.
2. Add 40 drops (2ml) of the Reagent HZ-1 to make it 7ml & mix well.
3. Add 2 micro spoon full of Reagent HZ-2 and mix well untill powder dissolves completely. Wait for 10 minutes.
4. Now rinse the empty comparator tube with above solution and fill upto the half level of the sample slot of comparator tube.
5. Insert this tube in sample slot of the comparator.
6. Compare the developed colour with standard comparator colours.
7. Note down the ppm level of hydrazine as N2H4.