Content Handbook F

Outline of method

High quality seed (certified seed) of cereals is treated with liquid seed treatment formulations in a laboratory seed treatment machine which utilises a rotary atomiser to atomise the formulation. The uniformity of the distribution of the formulation from seed to seed is determined colorimetrically.
The dye present in the formulation being extracted individually from 100 seeds.

Scope

One hundred cereal grains are representatively sampled from the 400g quantity of treated seed with a less appropriate sampler (e.g. a pill counter). The amount of formulation on each seed is individually determinded colorimetrically by measurement of the dye concentration on each seed.