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- 1453
Heavy metals and organic carbon in sediments of the Gulf of Riga
Data set information
| Query EDMED |
General | |
Data holding centre | Latvian Institute of Aquatic Ecology |
Country | Latvia |
Time period | 1996-2002 |
Ongoing | No |
Geographical area | Gulf of Riga |
Observations | |
Parameters | Inorganic chemical composition of sediment or rocks |
Instruments | Atomic absorption spectrometers |
Description | |
Summary | 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). |
Originators | Latvian Institute of Aquatic Ecology |
Data web site | http://www.lhei.lv |
Availability | |
Organisation | Latvian Institute of Aquatic Ecology |
Availability | By negotiation |
Contact | Rita Poikane (Researcher) |
Address | Latvian Institute of Aquatic Ecology |
Telephone | +371 67614840 |
Facsimile | +371 67601995 |
rita@monit.lu.lv | |
Administration | |
Collating centre | Latvian Institute of Aquatic Ecology |
Local identifier | 43001004 |
Global identifier | 1453 |
Last revised | 2010-11-22 |