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Testlab Geo-Services

About the Lab

The accredited testing laboratory Testlab Geo-Services carries out determinations of the chemical and isotopic composition of natural gas, calculations of other physicochemical parameters of the gas from the measured values and determinations of the isotopic composition of water. The laboratory holds a Certificate of Accreditation No. 600/2021, issued by the Czech Accreditation Institute, as a Testing Laboratory No. 1652. The laboratory therefore has an established quality management system in accordance with the ČSN EN ISO/IEC 17025:2018 standard.

Accredited Tests Offered


Determination of natural gas composition by gas chromatography and determination of the gas physicochemical parameters by calculating from measured values (according to SOP 01)

Determination of δ13C in methane by the CRDS method (according to SOP 03)

Determination of δ13C in carbon dioxide by the CRDS method (according to SOP 04)

Determination of δ18O and δ2H in water by the CRDS method (according to SOP 06)

Determination of δD in methane by the CRDS method (according to SOP 08)

Determination of δ17O in water by CRDS (according to SOP 07)*

Determination of water dew point in natural gas (according to SOP 09)

Determination of dew point of hydrocarbons in natural gas (according to SOP 10)

Field determination of methane concentration (according to SOP 11)*

Determination of δ13C in ethane and propane by the CRDS method (according to SOP 12)*

Determination of C6+ hydrocarbons by TDS-GC (including sampling, according to SOP 13)*

Determination of H2S, CO and odorants by infrared detection (according to SOP 14)*

Gas sampling (according to SOP 05)*

Water sampling (according to SOP 05)*

*Non-acredited test

The chemical composition of natural gas is determined by gas chromatography using FID detectors and TCD gas chromatograph GC 7890A (Agilent Technologies). The components to be determined include hydrocarbons (methane, ethane, propane, isobutane, n-butane, neopentane, isopentane, n-pentane, hexanes), helium, hydrogen, carbon dioxide, oxygen and nitrogen. The calculated physicochemical parameters include higher calorific value, lower calorific value, Wobbe index, density and relative density.

G2201-i spectrometer (Picarro, Inc.) is used to determine the isotopic composition in tests nos. 2 and 3; the L2140-i spectrometer (Picarro, Inc.) is used to determine the isotopic composition of oxygen (δ17O) in test no. 4. The isotopic composition of hydrogen (δD in methane) in test no. 5 is determined using gas chromatograph GC 7820A (Agilent Technologies) and G2182-i spectrometer (Picarro, Inc.).