Labs and Equipment
In the Department of Environmental and Ocean Science we are committed to providing students with critical time and experience in the field and in the lab.
Beckman Coulter LS-200 Laser Diffraction Particle Size Analyzer (LPS)
This instrument analyzes grain size distributions of sediments using laser diffraction. Sediment samples can be analyzed very quickly compared to traditional methods, and large numbers of samples can be processed effectively in a short period of time.
After cutting rocks into smaller sections on the rock saw, the jawbreaker can be used to fragment them into mm-cm pieces in preparation for pulverizing.
Used to grind rock fragments and sediments into power sized particles.
ICP IRIS Advantage
Capable of ppb level analysis of metals, minors, and major elements, the ICP is used by Chemistry and Environmental and Ocean Sciences on a variety of research and class projects including arsenic in drinking water, metals in acid digested sediments and fish tissues, and metals in proteins.
Milestone Ethos EZ Microwave DigesterThis laboratory grade microwave digestion system prevents the need for long duration experiments using acid and hotplates or water baths. Used to break down tissues and sediments in acids, peroxides, or other environmentally relevant matrices this instrument serves class projects and research in Environmental and Ocean Sciences and across other science departments at USD.
Olympus Innov-X X-5000 XRF AnalyzerCapable of analyzing trace elements in soils and rocks in addition to major elements, this portable XRF has provided chemical data on marine sediments, aquifer matrices, and local soils that are both anthropogenically and geogenically enriched in metals.
Perkin Elmer 3110 Flame Atomic Absorption SpectrometerOur most trusted and capable instrument for analysis of ions in solution, this Flame AAS is frequently used to measure major ions in seawater.
Perkin Elmer AAnalyst 800 Flame Furnace Atomic Absorption SpectrometerWhen sub-ppb level concentrations are required for ions in solution, the Graphite-Furnace is used. Projects include analysis of metals in rain, drinking water.
One saw dedicated to cutting of carbonate rocks and another saw dedicated to non-carbonates.
CHNOS Elemental Analysis
- High temperature combustion: Quantitative sample digestion at up to 1200°C
- Largest weighing range: From micro (<1mg) to macro (800mg soil) sample weight
- Largest dynamic range of element concentrations and element ratio: Up to 7 mg C abs. or 2 mg N abs. (or 100%), from ppm to 100%
- Temperature programmed Desorption (TPD): Separation of gaseous components with one TPD column for perfect separation without peak overlap. Automated optimization of the time per analysis.
- Multipoint calibration: Stable over months and matrix independent