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A cutting-edge facility for the analysis of C, N, O and H isotopes in environmental samples
Mass spec #1: Delta V plus (2007)

Instrument has 3 interfaces:

1. Flash 1112 TC+EA for analysis of solid and liquid C, N, O and H isotopes. Types of samples : solids (soils, sediments, plants, filters) and water. Can measure H/D and 18O in liquids in one injection, or in solids in one sample, and 13C and 15N in solids in one sample.

2. Trace GC with Split/Splitless injectors and cool-on-column injector. System has both combustion (15N, 13C) and pyrolysis (H/D) furnaces. Used to measure isotopic composition of individual compounds separated by gas chromatography.

3. Gas bench with cold finger preconcentrator. System is used to analyze the headspace gases in vials. In practice this means that it can analyze anything that can be chemically converted to a gas. Examples: 18O and 13C in carbonates, 18O and 15N in nitrate and nitrite, 15N in dissolved organic nitrogen or ammonium.

The Skidaway Institute Scientific Stable Isotope Laboratory (SISSIL) is able to analyze an extremely wide range of environmental samples -- a capability matched by no other lab in the Southeast.

One IRMS instrument is configured to analyze solid samples such as soils, and volatile and gas samples with a gas chromatograph.

The second instrument will be unique to the Southeast. It will be capable of measuring at very high precision the isotope ratios of gases dissolved in water and in the atmosphere, including unusual measurements only recently developed by the scientific community. It will also be able to directly analyze the composition of organic molecules in water.

Some of the first research to be conducted at SISSIL will involve examining local waters to identify nutrient sources.

Skidaway Institute is surrounded by outdoor, natural laboratories, such as salt marshes, estuaries and the coastal ocean. Having the SISSIL facility located on our campus furnishes collaborating researchers and students with instant feedback on experimental results during their field studies.

More long-range studies should provide valuable insights into the causes of algal blooms in Georgia's estuaries; improve the understanding of how urbanization affects water quality; and drive fundamental research on the carbon cycle within our environment.

More info

Skidaway Institute of Oceanography, 10 Ocean Science Circle, Savannah, GA 31411 (912) 598-2400
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