Radiocarbon Dating Lab

We provide radiometric 14C dating services for 35 years and sample prep for AMS 14C dating in collaboration with Oxford Univ., Lawrence Livermore National Lab, and now UC-Irvine for 20 years.

Facilities

The ISGS 14C dating lab is equipped with a benzene synthesis vacuum line and two low level liquid scintillation spectrometers.

Design of pyrolysis-combustion systemReducing Cajon is critical for pyrolysis without O2

Burning of volatile compounds at the orifice of inner chamber

Left: Design of pyrolysis-combustion system. Middle: Reducing Cajon is critical for pyrolysis without O2. Right: Burning of volatile compounds at the orifice of inner chamber.

 

The pyrolysis-combustion system

large combustion vessel

Above Left: The pyrolysis-combustion system is unique, which partitions total organic carbon into low and high molecular weight  organic compound groups for dating. It also provides a safe combustion vessel for samples with high volatile content such as nutshell and fresh wood.

Above Right: It can be interfaced with a, large combustion vessel capable of processing up to 4 kg sediments, and can be interfaced with an acidification apparatus for carbonate dating including up to 5 gallon water for DIC. 

 

CO2 molecular sieve

Finnegan 252 Isotope Ratio Mass Spec

Above Left: It can be interfaced with a molecular sieve to trap CO2 in front and a water collection vessel in back to process methane gas for 14C dating and combustion water for 3H studies.

Above Right: Finnegan 252 Isotope Ratio Mass Spec is used to analyze δ13C from one aliquot of CO2, split  during benzene synthesis or AMS sample prep for 14C dates correction.

 

lithium-CO2 reaction line

V2O5 catalyst

Above Left: The lithium-CO2 reaction line for acetylene, which is trimerized into benzene using V2O5 catalyst.

Above Right: The V2O5 catalyst column is activated at 250ºC under vacuum before trimerization and benzene is extracted at 80 ºC under vacuum for LSC analysis.

 

Wallack 1220 Quantulus

Packard 2000CA/LL TRI-CARB® Liquid Scintillation Analyzer

Above Left: Wallack 1220 Quantulus™ Ultra Low Level Liquid Scintillation spectrometer.

Above Right: Packard 2000CA/LL TRI-CARB® Liquid Scintillation Analyzer.