# 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 5.1: Low working range and limits of quantification

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

For PCDD/Fs, detectable quantities shall be in the upper femtogram (10 – 15 g) range because of extreme toxicity of some of these compounds. For most PCB congeners a limit of quantification in the nanogram (10 – 9 g) range is already sufficient. For the measurement of the more toxic dioxin-like PCB congeners (in particular non-ortho-substituted congeners), the lower end of the working range shall reach the low picogram (10 – 12 g) levels. For all other PCB congeners a limit of quantification in the nanogram (10 – 9 g) range is sufficient.

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Source: https://www.legislation.gov.uk/eur/2009/152/annex/V/division/B/chapter/II/division/5/division/5.1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-152/annex-V/division-B/chapter-II/division-5/division-5.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.