Notation

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Notations

• In this booklet we have used the following format for expressing units followed by their characterization and matrix information in parenthesis: 10 ng/kg (WHO-TEq in fat)

• Σ (sigma), sum. Ordered alphabetically at the main entry disregarding the prefix (e.g. Σ7PCB, see PCB).

• b.w., body weight.

• deka-, ten. E.g., dekachloro- ten chlorine atoms in a molecule.

• di-, two. E.g., dichloro- two chlorine atoms in a molecule.

• d.w., dry weight.

• hepta-, seven. E.g., heptachloro- seven chlorine atoms in a molecule.

• hexa-, six. E.g., hexachloro- six chlorine atoms in a molecule.

• microgram (µg), 0.000,001 g. See units.

• mono-, one. E.g., monochloro- one chlorine atom in a molecule.

• nanogram (ng), 0.000,000,001 g. See units.

• ng, nanogram. See units.

• nona-, nine. E.g., nonachloro- nine chlorine atoms in a molecule.

• octa-, eight. E.g., octachloro- eight chlorine atoms in a molecule.

• ΣPCB, the sum (total weight) of all PCB congeners.

• Σ7PCB, the sum (total weight) of the seven marker PCBs (see this).

• ΣPCDD/F, the sum (total weight) of the 17 PCDDs and PCDFs with a TEF value >0.

• penta-, five. E.g., pentachloro- five chlorine atoms in a molecule.

• picogram (pg), 0.000,000,000,001 g. See units.

• ppb, parts per billion (American). A non-standard concentration unit equal to ng/g or µg/kg or 10-9 g/g.

• ppt, parts per trillion (American). A non-standard concentration unit equal to pg/g or ng/kg or 10-12 g/g.

• tetra-, four. E.g., tetrachloro- four chlorine atoms in a molecule.

• tri-, three. E.g., trichloro- three chlorine atoms in a molecule.