Other Analytical Equipment
Gas Chromatograph-Mass Spectrometric Detector
The Agilent 6890N GC used for compound specific isotope analysis is also interfaced with a 5975C Agilent quadrupole mass spectrometer for quantification/identification of organic compounds. Applications include the analysis of hydrocarbons extracted from sediments, trihalomethanes in drinking water, and of contaminants in tree cores by headspace analysis.
Gas Chromatograph-Flame Ionization Detector / Thermal Conductivity Detector
This Agilent 6890A GC is equipped with a FID and TCD in series. Sample introduction is via a Gerstel Multi Purpose Sampler, which can handle both liquid and gaseous samples. The GC-FID/TCD is mainly used for the quantification of permanent gases, such as CO2, H2, and CH4.
Gas Chromatograph-Flame Ionization Detector / Electron Capture Detector
This GC is an Agilent 6890A model with a FID and ECD in parallel. It is used with a Gerstel Multi Purpose Sampler, which can handle both liquid and gaseous samples. This GC is mainly used for quantification of fatty acids (as methyl esters) and of hydrocarbons, and for headspace analysis of volatile organic contaminants (e.g. BTEX) in aqueous solutions. It is also used in combination with the preparative fraction collector.
Preparative Fraction Collector
The GC-FID/ECD is interfaced with a Gerstel Preparative Fraction Collector. This allows for the collection of up to 6 different fractions during a GC run. In order to collect enough material, several dozen injections or more may be necessary. The collector can be automatically cooled with liquid nitrogen to a user defined temperature.
Applications include the collection of fractions for compound specific 14C analysis by Acceleration Mass Spectrometry (not available at MUN), and collection of compounds for further analysis by e.g. Nuclear Magnetic Resonance (NMR) or infrared spectrometry, in case mass spectrometry is not sufficient for unambiguous product identification.