TALLINN UNIVERSITY OF TECHNOLOGY

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Laboratory of Geochemistry and Mineralogy

The laboratory will be closed for maintenance and summer holidays from 1 June to 31 August.

Contact person: PhD Siim Pajusaar, tel 58846848

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Laboratory of Isotope and Hydrogeochemistry

Contact person: PhD Merlin Liiv, tel 5399 8112

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Isotopic composition of organic matter (carbon and nitrogen) in sediments and other samples are analysed with a stable isotope mass spectrometer Delta V Advantage.

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The gas preparation and injection system is FlashEA 1112 + ConFlo IV.

The isotopic composition of water samples is determined with a Picarro laser spectrometer and the ionic composition with a Thermo Dionex ion chromatograph ICS-1100 Autosampler AS-DV:

Detectable ions:

Fluoride, chloride, nitrite, bromide, nitrate, phosphate, sulphate, lithium, sodium, ammonium, potassium, magnesium, calcium, strontium and barium.

Measurement accuracy depending on the ion to be determined is between 0.8% and 5.4% at the mean calibration concentrations of these ions.

To determine the isotopic composition of water, a Picarro L2120 laser spectrometer is available in the laboratory:

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Laboratory of Sedimentology and Paleoecology

Contact person: PhD Tiiu Alliksaar, tel 5888 0632

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Services
- Analysis of the organic, carbonate and silicic composition of sediments by the incineration method
- Analysis of the elemental composition of the sediment organic matter (total C, orgC, total N, H, S, O)

Pre-treatment of sediment, peat, soil, rock or water samples for biological, biostratigraphic (pollen, siliceous algae, macrofossils, etc.) or chemical analyses. Analysis of the chemical composition of the organic matter of sediments and other samples, as well as the analysis of the main components of the composition of the sediments.
From the main components of the sediment composition, we determine the content of organic, carbonate and terrigenous substances by the incineration method. From the elemental composition of organic matter, we can determine the content of total carbon, organic carbon, total nitrogen, hydrogen, sulfur and oxygen.
The Laboratory of Sedimentology and Paleoecology is equipped with a Thermo FLASH 2000 CHNS-O elemental analyser for organic matter. There are three fume cupboards (Retent Ltd.), one of which is a fume cupboard with individual exhaust and a special air cleaning filter for working with hydrogen fluoride. In addition, the laboratory has a number of equipment for chemical treatment of samples - hot plates, water bath (Julabo TW 20), hot plate with sand bath (Clifton HP1-2D), centrifuge (Hettich Universal 320), mixers (Vortex Genie 2) and mixer (RETSCH MM 400). The samples are weighed using electronic analytical and technical scales (Mettler Toledo), and the samples are dried or incinerated in drying ovens (Termaks) and incinerators (Nabertherm) or freeze dryers (Scanvac Coolsafe 55) in a special incinerator. The laboratory uses analytically pure water from the Millipore Elix 3 water treatment plant.

Särghaua Earth Science Centre

Contact person: Centre Administrator PhD Maris Rattas, tel 5884 6443

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