# Commission Regulation (EC) No 152/2009 of 27 January 2009 laying down the methods of sampling and analysis for the official control of feed (Text with EEA relevance), Division 6.1: From the specific optical density

Extent: E+W+S+N.I.

The specific optical densities, under the conditions described, will be the following:
Free gossypol:
E1%1 cm=625
Total gossypol:
E1%1 cm=600
The free or total gossypol content of the sample is calculated by using the following formula:
% gossypol:E ×1 250E 1 %1cm×p ×awhere:
Ecorrected optical density, determined as indicated in 5.2,
ptest sample in g,
aaliquot part of the filtrate in ml.

---
Source: https://www.legislation.gov.uk/eur/2009/152/annex/V/division/A/division/6/division/6.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-V/division-A/division-6/division-6.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.