RT Report T1 Determination of Total Cadmium, Zinc, Lead and Copper in Selected Marine Organisms by Atomic Absorption Spectrophotometry: Reference Methods for Marine Pollution Studies No. 11 Rev. 1 K1 reference material K1 cadmium K1 lead K1 copper K1 marine ecosystem K1 testing K1 heavy metal K1 mineral K1 chemical YR 1984 FD 1984 LK https://wedocs.unep.org/handle/20.500.11822/28494 UL https://wedocs.unep.org/handle/20.500.11822/28494 NO This reference method describes the determination of tot8l cadmium, total copper, total lead and total zinc in biological material by atomic absortion spectrophotometry after the organic matter has been decomposed by wet chemical digestion under pressure. DS UN Environment Document Repository RD Sep 20, 2026