Section 5: Sample Preparation

The carton is opened and the detergent riffled until it is approximately 250 ml in volume. If the original sample is approximately one pound or less in size, the working volume (i.e. 250 ml) is obtained by careful mixing and quartering.

This subsample is then ground in a Waring blender at high speed for two minutes. The blended sample is stored in an 8-oz. polystyrene container having a tight fitting lid.