# 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 7.3: The following feed materials, where they are present in significant amounts in feed, are known to give rise to interferences when determining the starch content by the polarimetric method and thereby incorrect results could be yielded:

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

(sugar) beet products such as (sugar)beet pulp, (sugar) beet molasses, (sugar) beet pulp — molassed, (sugar) beet vinasse, (beet) sugar,
citrus pulp,
linseed; linseed expeller; linseed extracted,
rape seed; rape seed expeller; rape seed extracted; rape seed hulls,
sunflower seed; sunflower seed extracted; sunflower seed, partially decorticated, extracted,
copra expeller; copra extracted,
potato pulp,
dehydrated yeast,
products rich in inulin (e.g. Chips and meal of Jerusalem artichokes),
greaves.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/III/division/L/division/1/division/7/division/7.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-III/division-L/division-1/division-7/division-7.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.