Seawater Analysis

If you're looking to automate your sea water analysis methods, do what hundreds of leading laboratories around the world do and choose the high precision SEAL AutoAnalyser. Thanks to the robust design and low detection limits it's the first choice of sea water analysis laboratories and research institutes worldwide.  The AA500 AutoAnalyser and QuAAtro AutoAnalysers are all ideal for onboard sea water analysis.

 SEAL analysers use the principles of air- segmented flow injection analysis to measure the precision of the bubble pattern, flowcell cleanliness, chemistry drift and other performance-critical parameters before and during a run. More than 30 hydraulic, optical, electrical and chemical parameters are quantified and written into a performance log which gives a long-term record of instrument and method performance.

USEPA, ASTM, ISO, AOAC, DIN, CORESTA and other international regulatory compliant methods.

Advantages of Automated Sea Water Analysis Methods using SEAL AutoAnalysers

SEAL AutoAnalysers are designed specifically to cope with the demands of researchers looking to automate their sea water analysis methods.  SEAL AutoAnalysers are in routine ship-board use from the Arctic Ocean to the Weddell Sea and they are recognised worldwide for their ability to stand up to tough on-board conditions..  The latest instruments for sea water analysis methods use LED light sources as they are unaffected by vibration and are extremely stable.  A special bench fixing kit is available for the SEAL Analytical QuAAtro39to quickly and securely mount it into a floating laboratory.

Pre-run Check Quantifies System

A simple pre-run check quantifies the bubble pattern, baseline, detector, flowcell and light source in a few minutes and creates a printed record of the results. This is ideal for labs which need auditable proof that the analyser is working correctly, and as a valuable aid to troubleshooting.

High Precision Segmentation

For seawater analysis the key factor in reproducibility, which is critical for detection limits, and  the composition of the liquid segments passing through the analyser. Each segment must contain the same proportion of reagent and sample, and the arrival time of each segment at the reagent injection points must be very precise.

Seal Electronic Air Injection vs. Mechnical Air Injection

SEAL AutoAnalyser achieve this high precision with electronic air injection.  The timing of the air injection is determined by a chopper wheel which intercepts a light beam, this triggers a solenoid valve to inject the air. In contrast, mechanical systems which use a cam and lever device are less accurate even when new, and the air timing becomes progressively less precise as the pump ages. With mechanical air injection the bubble precision on a typical nutrient manifold is around 2%. With electronic injection it is improved to less than 1%. On the QuAAtro39 it is 0.2%.    

 

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