Division 5.1 Low working range and limits of quantificationF1

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.