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A submersible osmotically pumped analyzer (Fe-OsmoAnalyzer) has been adapted for the long-term continuous high resolution monitoring of iron(II) and (III) in deep-sea hydrothermal vents. Ferrozine is used as the colorimetric reagent. The detection limit for our analyzer is 0.1μM for a 0.7cm pathlength with a linear response up to 50μM. The Fe-OsmoAnalyzer uses periodic injections of standards and...
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