SCHEDULE 2 Methods of analysis

APPENDIX TO SCHEDULE 2

Part I, Method 3c

Figure 5KEY TO FIGURE 5

(a) A round-bottomed, long-necked flask of 750 or1,000 ml capacity with a bell mouth.

(b) Distillation tube with a splash head and a spherical joint.

(c) Elbow tube with a spherical joint and a drip cone. (A suitable connection may be used instead of the spherical joint).

(d) A six-bulb condenser with an extension tube mounted on a rubber bung holding a bubble trap.

(e) 1750 ml receiving flask.

(f) A bubble trap to prevent loss of ammonia.

• The equipment is made of borosilicate glass.