European Directory of Marine Environmental Data (EDMED)

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Data set name

Heavy metals and organic carbon in sediments of the Gulf of Riga

Data holding centreLatvian Institute of Aquatic Ecology
CountryLatvia  Latvia
Time period1996-2002
Geographical area

Gulf of Riga


Inorganic chemical composition of sediment or rocks


Atomic absorption spectrometers


Heavy metals and supporting parameters monitoring in sediments of the Gulf of Riga has been carried out from 1996 to 2002, with geochemical (aluminium, iron, manganese) and heavy (cadmium, chromium, copper, lead, mercury, nickel, zinc) metal and organic carbon levels being measured. The measurements were performed within marine monitoring program by national responsible bodies. Sampling was done using research vessels 'Antonija' once a year. Sediment samples were collected using Kajak gravity corer. After sampling top 6 cm (1996-1999) or 10 cm (2000-2002) of sediment core was sliced with step 2 cm and immediately frozen (-18 C). Strategy of sampling 1996 - first sampling locations (depth >20m) were chosen for sediment structure investigation. 1997-2000 sampling locations were combined with hydrological deepwater (>40 m) stations where fine-grained material (grain size <0.63 um) was 50%. Since 2001 according to ICES/HELCOM recommendation (EC MON 4/99, INF. 14/Item 4.1) point sampling strategy was changed to polygon sampling. Digestion for metal analysis 1996-1999 digestion with nitric acid in pressure bomb at 140 C. Since 2000 digestion with nitric acid in microwave oven closed system. Digested samples were analysed by atomic absorption spectrophotometer. Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn by flame, Hg - cold vapour technique. Organic carbon was analysed since 2001 by elemental CHNS analyser. Data base cover Gulf of Riga. Data in database are final values with SD (since 2000).

OriginatorsLatvian Institute of Aquatic Ecology
Data web site
OrganisationLatvian Institute of Aquatic Ecology
AvailabilityBy negotiation
ContactRita Poikane (Researcher)

Latvian Institute of Aquatic Ecology
Voleru str.4


Telephone+371 67614840
Facsimile+371 67601995
Collating centreLatvian Institute of Aquatic Ecology
Local identifier43001004
Global identifier1453
Last revised2010-11-22