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The Woods Hole Oceanographic Institution Nutrient Analytical Facility utilizes several state of the art methods and instruments for quantifying bio-element concentrations in environmental samples. The facility operates a Lachat Instruments QuickChem 8000 four-channel continuous flow injection system to determine dissolved nutrient concentrations in aquatic ecosystems ranging from groundwater to the open ocean. It offers a high sample throughput coupled with simple and rapid method changeover to maximize productivity in determining nutrients including: ammonium, nitrate, nitrite, orthophosphate, silicate, and total dissolved nitrogen. The methods used for analysis are USEPA approved. For solid phase carbon and nitrogen determination, the facility houses a Flash EA1112 Carbon/Nitrogen Analyzer using a Dynamic Flash Combustion technique. The instrument is very dependable and has been proven to have a high degree of reproducibility. The facility also operates two in-situ chemical analyzers (Ecolab & NAS). These instruments are user programmable for many different sampling regimes and are self-calibrating and highly resistant to fouling. The Ecolab is currently fitted for ammonium, phosphate, and the NAS with a nitrite+nitrate detector. The Ecolab and NAS can be used in a variety of moored systems.
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Nutrient Analytical Facility
