Laboratory Technologies

3 Dec 2015

AutoAnalyser 3- the First Choice in Seawater Analysis

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Every month Researchers from University of Hawaii, School of Ocean and Earth Science and Technology (SOEST) venture to the deep-water station ALOHA with their AutoAnalyser 3.
The Researchers journey to ALOHA (A Long-Term Oligotrophic Habitat Assessment; 22o 45’N, 158o 00’W) located 100km north of Oahu, Hawaii to observe the hydrography, chemistry and biology of the water column. Like many others in the Seawater community they trust their analysis to their on-board SEAL AutoAnalyser 3 (AA3).

Thanks to the AutoAnalyser 3 (AA3) Segmented Flow Analyser’s robust design and incorporation of clever design features like an LED  light source, the calibrations made on board do not differ from calibrations made in their land laboratory.The AutoAnalyser 3 (AA3)  is unaffected by the ship’s vibrations, and anything a rolling sea can throw at it.

Susan Curless, the lead Nutrient Analyst for the program since 2005 uses the  SEAL AutoAnalyser 3 (AA3) to fully support the nutrient analyses required with measurements of water column chemistry, currents, optical properties, primary production, plankton community structure and rates of particle export made on each cruise. Both inorganic and organic nutrient samples in seawater are analysed to provide a description of water column chemistry.

Nutrient samples collected from the surface ocean and to a depth of ~4800m are also frozen and brought back to the lab for analysis of NO3+NO2, PO4 and Si(OH)4 concentrations. These seawater nutrients are analysed using a SEAL Analytical AutoAnalyser 3 (AA3) Segmented Flow Analyser. Samples are loaded onto the sampler and analysed colorimetrically for each nutrient simultaneously, generating around 300 tests an hour. 

Scientists working on the Hawaii Ocean Time-series (HOT) program have been making repeated observations of water column at a station north of Oahu, Hawaii since October 1988. HOT is based out of the School of Ocean and Earth Science and Technology (SOEST) at the University of Hawaii and receives funding from the U.S National Science Foundation. The objective of HOT research is to provide a comprehensive description of the ocean at a site representative of the North Pacific subtropical gyre.

 

Contact us on 02 4735 5054 or for more information on seawater analysis.

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