Necessary condition for a reliable crude fibre determination is a low fat content (< 10%) of the sample. Samples exceeding this value require a preliminary fat extraction with acetone and hexane or petroleum.

The behrotest® DG 2+2 and DG 6 perform a rapid fat extraction directly in the same glass crucibles used in the

CF 2+2 and CF 6. The user can start crude fibre extraction immediately after completing fat extraction.

Practical tray for transfer of crucibles prevents any possible sample loss, as the same crucibles can be processed by the CF extraction units.