A miniature and field-applicable multipumping flow analyzer for ammonium monitoring in seawater with fluorescence detection

Burkhard Horstkotte; Carlos M. Duarte; Víctor Cerd

doi:10.1016/j.talanta.2011.03.078

A miniature and field-applicable multipumping flow analyzer for ammonium monitoring in seawater with fluorescence detection

Burkhard Horstkotte, Carlos M. Duarte, Víctor Cerd^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

In this article, a simple, economic, and miniature flow analyzer for ammonium in seawater based on the solenoid micropumps is presented. A single reagent of sodium tetraborate, ortho-phthaldialdehyde (OPA), and sodium sulfite was used and optimized applying the modified SIMPLEX method. A special-made detection cell for fluorescence detection of the reaction product isoindol-1-sulfonat was made and combined with a commercial photomultiplier tube, a long-pass optical filter, and an UV-LED as excitation light source. A LOD down to 13 nmol/L was achieved. The fabrication and application of a miniature reaction coil heating device for reaction rate enhancement is further described. The system featured an injection frequency of 32 h^-1 at average standard deviation of 3%.

Original language	English (US)
Pages (from-to)	380-385
Number of pages	6
Journal	Talanta
Volume	85
Issue number	1
DOIs	https://doi.org/10.1016/j.talanta.2011.03.078
State	Published - Jul 15 2011
Externally published	Yes

Keywords

Ammonium
Fluorescence detection
LED excitation
Long-pass optical filter
Miniature reaction coil thermostat
Multipumping flow analysis
Photomultiplier
Seawater
o-phthalaldehyde

ASJC Scopus subject areas

Analytical Chemistry

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10.1016/j.talanta.2011.03.078

Cite this

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title = "A miniature and field-applicable multipumping flow analyzer for ammonium monitoring in seawater with fluorescence detection",

abstract = "In this article, a simple, economic, and miniature flow analyzer for ammonium in seawater based on the solenoid micropumps is presented. A single reagent of sodium tetraborate, ortho-phthaldialdehyde (OPA), and sodium sulfite was used and optimized applying the modified SIMPLEX method. A special-made detection cell for fluorescence detection of the reaction product isoindol-1-sulfonat was made and combined with a commercial photomultiplier tube, a long-pass optical filter, and an UV-LED as excitation light source. A LOD down to 13 nmol/L was achieved. The fabrication and application of a miniature reaction coil heating device for reaction rate enhancement is further described. The system featured an injection frequency of 32 h-1 at average standard deviation of 3%.",

keywords = "Ammonium, Fluorescence detection, LED excitation, Long-pass optical filter, Miniature reaction coil thermostat, Multipumping flow analysis, Photomultiplier, Seawater, o-phthalaldehyde",

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T1 - A miniature and field-applicable multipumping flow analyzer for ammonium monitoring in seawater with fluorescence detection

AU - Horstkotte, Burkhard

AU - Duarte, Carlos M.

AU - Cerd, Víctor

PY - 2011/7/15

Y1 - 2011/7/15

N2 - In this article, a simple, economic, and miniature flow analyzer for ammonium in seawater based on the solenoid micropumps is presented. A single reagent of sodium tetraborate, ortho-phthaldialdehyde (OPA), and sodium sulfite was used and optimized applying the modified SIMPLEX method. A special-made detection cell for fluorescence detection of the reaction product isoindol-1-sulfonat was made and combined with a commercial photomultiplier tube, a long-pass optical filter, and an UV-LED as excitation light source. A LOD down to 13 nmol/L was achieved. The fabrication and application of a miniature reaction coil heating device for reaction rate enhancement is further described. The system featured an injection frequency of 32 h-1 at average standard deviation of 3%.

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KW - Ammonium

KW - Fluorescence detection

KW - LED excitation

KW - Long-pass optical filter

KW - Miniature reaction coil thermostat

KW - Multipumping flow analysis

KW - Photomultiplier

KW - Seawater

KW - o-phthalaldehyde

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EP - 385

JO - Talanta

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A miniature and field-applicable multipumping flow analyzer for ammonium monitoring in seawater with fluorescence detection

Abstract

Keywords

ASJC Scopus subject areas

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