Data on amounts of various functional groups, i.e. aldehyde, acid, ester, alcohol, thiol and aromatic groups in several fractions of low-polarity dissolved organic matter are presented. An assumption that this organic matter is part of the lipid fraction is not confirmed. Amount of aromatic compounds in waters of the Northwest Indian Ocean is estimated to be about 1000 times higher than quantity of aromatic hydrocarbons discharged into the ocean each year in petroleum and petroleum products.

Supplement to: Smirnov, M B; Bordovsky, Oleg K (1985): Structural group composition of chloroform extracts of dissolved organic matter in waters of the Northwest Indian Ocean. Oceanology, 25(4), 462-465