GEOCHEMICAL ANALYSES
NOBLE GAS ANALYSIS
Noble gases are particularly useful for tracing fluid flow because their elemental and isotopic abundances are maintained independent of microbial activity, chemical reactions, and changes in oxygen fugacity.
Isotopes Measured:
-
Helium - He-3, He-4
-
Neon - Ne-20, Ne-21, Ne-22
-
Argon - Ar-36, Ar-38, Ar-40
-
Krypton - Kr-78, Kr-80, Kr-82, Kr-83, Kr-84, Kr-86
-
Xenon - Xe-124, Xe-126, Xe-128, Xe-129, Xe-130, Xe-131, Xe-132, Xe-134, Xe-136
Instrument:
ThermoFisher Helix Split Flight Tube Noble Gas Mass Spectrometer
MAJOR GAS ANALYSIS
Determine what the main components of your sample are. Major gas analyses are included in a noble gas analysis.
Compounds Measured:
-
Nitrogen
-
Oxygen
-
Argon
-
Carbon Dioxide
-
Methane
-
Ethane
-
Hydrogen
-
Hydrogen Sulfide
Instrument:
SRS Residual Gas Analyzer Quadrupole Mass Spectrometer
HYDROCARBON ANALYSIS
Determine the composition of produced gases or dissolved gases in groundwater with increased focus on hydrocarbons.
Compounds Measured:
-
Hydrocarbons
-
Methane
-
Ethane
-
Propane
-
isoButane
-
Butane
-
isoPentane
-
Pentane
-
Hexane+
-
-
Carbon Dioxide
-
Nitrogen
-
Oxygen
Instrument:
SRI 8610C Multi-Gas Gas Chromatograph with FID and TCD Detectors
TRITIUM AND RESIDENCE TIME OF WATER OR GAS
Compounds Measured:
-
H-3 concentrations (in T.U.) in water
-
H-3/He-3 mean residence time in water for young water (<~80 years)
-
He-4 mean residence time in water or gas for older water