Assimilable organic carbon in molecular weight fractions of natural organic matter.

Abstract Assimilable organic carbon (AOC) in natural organic matter (NOM) has been measured in three Norwegian waters. The AOC measurement has been done on unfiltered and membrane-filtered (molecular weight (MW) cut-off of 1000 and 10,000) samples. While the colour in the waters is mainly related to the NOM with MW>10,000, the AOC was mainly related to the NOM with MW