Marine Science Faculty Publications

Long Pathlength Absorbance Spectroscopy: Trace Analysis of Fe(II) Using a 4.5 m Liquid Core Waveguide

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Iron, Analysis, Absorbance spectroscopy, Long pathlength spectroscopy, Liquid core waveguide

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A Liquid Core Waveguide (LCW) can be used to extend the sensitivity of conventional absorbance spectroscopy by two or more orders of magnitude. Analysis of dissolved iron concentrations with a 4.47 m pathlength LCW made of Teflon AF-2400 provides a 0.2 nmol dm−3 detection limit and a linear response between 0.5 and 10 nmol dm−3. No preconcentration is required in this analysis. The analytical procedures employed in long pathlength absorbance spectroscopy are amenable to miniaturization and autonomous operation.

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Citation / Publisher Attribution

Analytica Chimica Acta, v. 357, issue 1-2, p. 99-102