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            <gco:CharacterString>The data represent sampling time and field measurements, the computed results of gas content - methane, ethane from GC-FID (Gas chromatography with flame ionization detector) and carbon dioxide from GC-TCD (Gas chromatography with thermal conductivity detector) measurements as well as dissolved substances determined with spectrophotometry, ion chromatography (IC), inductively coupled optical emission spectroscopy (ICP-OES) and headspace gas chromatography mass spectrometry (HS-GC-MS) methods. Dissolved gases were analysed with use of the headspace extraction technique.</gco:CharacterString>
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