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Real-time monitoring of picomolar levels of iron(II) in marine waters using automated flow injection-chemiluminescence instrumentation

Real-time monitoring of picomolar levels of iron(II) in marine waters using automated flow injection-chemiluminescence instrumentation
Real-time monitoring of picomolar levels of iron(II) in marine waters using automated flow injection-chemiluminescence instrumentation
A shipboard-deployable, flow-injection (FI) based instrument for monitoring iron(II) in surface marine waters is described. It incorporates a miniature, low-power photon-counting head for measuring the light emitted from the iron(II)-catalyzed chemiluminescence (CL) luminol reaction. System control, signal acquisition, and data processing are performed in a graphical programming environment. The limit of detection for iron(II) is in the range 8-12 pmol L-1 (based on 3s of the blank), and the precision over the range 8-1000 pmol L-1 varies between 0.9 and 7.6% (n = 4). Results from a day-night deployment during a north-to-south transect of the Atlantic Ocean and a daytime transect in the Sub-Antarctic Front are presented together with ancillary temperature, salinity, and irradiance data. The generic nature of the components used to assemble the instrument make the technology readily transferable to other laboratories and the modular construction makes it easy to adapt the system for use with other CL chemistries.
4600-4607
Bowie, A.R.
9e60fe12-98c0-4ea7-9c2f-126a997a9f7b
Achterberg, E.P.
685ce961-8c45-4503-9f03-50f6561202b9
Sedwick, P.N.
852dfecb-125a-46aa-9628-548f0e0911c9
Ussher, S.
25e332ba-ce47-4590-9881-0e01aa6bdc92
Worsfold, P.J.
2edcddc5-ce8e-4f9f-8628-216a26921979
Bowie, A.R.
9e60fe12-98c0-4ea7-9c2f-126a997a9f7b
Achterberg, E.P.
685ce961-8c45-4503-9f03-50f6561202b9
Sedwick, P.N.
852dfecb-125a-46aa-9628-548f0e0911c9
Ussher, S.
25e332ba-ce47-4590-9881-0e01aa6bdc92
Worsfold, P.J.
2edcddc5-ce8e-4f9f-8628-216a26921979

Bowie, A.R., Achterberg, E.P., Sedwick, P.N., Ussher, S. and Worsfold, P.J. (2002) Real-time monitoring of picomolar levels of iron(II) in marine waters using automated flow injection-chemiluminescence instrumentation. Environmental Science & Technology, 36, 4600-4607. (doi:10.1021/es020045v).

Record type: Article

Abstract

A shipboard-deployable, flow-injection (FI) based instrument for monitoring iron(II) in surface marine waters is described. It incorporates a miniature, low-power photon-counting head for measuring the light emitted from the iron(II)-catalyzed chemiluminescence (CL) luminol reaction. System control, signal acquisition, and data processing are performed in a graphical programming environment. The limit of detection for iron(II) is in the range 8-12 pmol L-1 (based on 3s of the blank), and the precision over the range 8-1000 pmol L-1 varies between 0.9 and 7.6% (n = 4). Results from a day-night deployment during a north-to-south transect of the Atlantic Ocean and a daytime transect in the Sub-Antarctic Front are presented together with ancillary temperature, salinity, and irradiance data. The generic nature of the components used to assemble the instrument make the technology readily transferable to other laboratories and the modular construction makes it easy to adapt the system for use with other CL chemistries.

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Published date: 2002
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 12537
URI: http://eprints.soton.ac.uk/id/eprint/12537
PURE UUID: ff0bb044-325b-4895-9b6a-07324907b78e

Catalogue record

Date deposited: 26 Nov 2004
Last modified: 15 Jul 2019 19:35

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