Instrumentation Laboratory

 

Instrumentation Laboratory

The instrumentation laboratory is 890 sq ft and currently has five isotope ratio mass spectrometers and three cavity-ring-down spectroscopy lasers devoted to the isotopic analyses of hydrogen, carbon, nitrogen, oxygen, and sulfur. Each instrument is computer controlled with Windows-based software. Two additional computers are available for data reduction. Three computers are utilized for local backup. The lab also uses IBM's Tivoli Storage Manager for off-site backup. This lab also has a chemical fume hood and compressed gas cylinder rack.

Below are links to each method currently running.

Kiel III Carbonate Device

Carbonate δ13C δ18O

We use a Kiel III Carbonate Device coupled to a Thermo Finnigan Delta Plus IRMS for a dual-inlet based δ13C and δ18O measurement of small carbonate samples.

Thermo Finnigan MAT253

Carbonate Δ47

We use a Thermo MAT253 with 10-position multiport to automatically introduce and analyze purified CO2 from pyrex flame-sealed ampules for δ13C, δ18O, and Δ47.

Thermo Finnigan DeltaPlus Advantage

Nitrate - δ15N, δ18O, δ17O

We use the bacterial denitrifier method to reduce nitrate to nitrous oxide with subsequent purification and analysis of δ15N, δ17O, and δ18O using a Thermo Finnigan Precon and GasBench coupled to a DeltaPlus Advantage.

 
Thermo Finnigan MAT253

Solid - δ13C, δ15N

We use elemental analysis to combust, convert, and purify solid materials into CO2 and N2 for the analysis of δ13C and δ15N using a Costech elemental analyzer coupled to a Thermo MAT253 isotope ratio mass spectrometer.

Thermo Finnigan MAT253

Solid - δ34S

We use elemental analysis to combust, convert, and purify solid materials into SO2 for the analysis of δ34S using an Eurovector elemental analyzer coupled to a Thermo MAT253 isotope ratio mass spectrometer.

Thermo Finnigan MAT253

Sulfate or Nitrate - Δ17O

We use the silver salt pyrolysis method in a TC/EA coupled to a Thermo Finnigan MAT253 for a continuous flow based analysis of nitrate or sulfate Δ17O.

 
CRDS

Water δD, δ17O, δ18O, 17Oexcess

We use one Picarro cavity ring down spectrometer to measure δD, δ17O, δ18O, and 17Oexcess of water.

CRDS

Water δD, δ18O

We employ two Picarro cavity ring down spectrometers to measure δD and δ18O of water.

Thermo Finnigan MAT253

Water 17Oexcess

We employ the water fluorination method with Cobalt (III) fluoride to convert H2O into O2 for subsequent triple oxygen istope analysis using dual-inlet isotope ratio spectrometry on a Thermo MAT253.