Division 1 Apparatus and reagents

As stipulated in Section A(1).

Additional equipment:

1. (a)

   1 litre Gelman funnel, complete with filter holder (diameter 45 mm);

2. (b)

   filter discs, consisting of a circular stainless steel mesh with an aperture of 35 microns (disc diameter: 45 mm), two rubber rings 1 mm thick (external diameter: 45 mm; internal diameter: 38 mm), the circular mesh being placed between the two rubber rings and bonded to them using a two-component glue suitable for the two materials;

3. (c)

   an Erlenmeyer flask, capacity 3 litres, fitted with a side tube for suction;

4. (d)

   a filter pump;

5. (e)

   plastic bags, capacity at least 80 ml;

6. (f)

   equipment for sealing the plastic bags;

7. (g)

   rennilase, strength 1:150 000 Soxhlet units per gram.