Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559790 | Talanta | 2011 | 6 Pages |
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 13Â 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 32Â hâ1 at average standard deviation of 3%.
Related Topics
Physical Sciences and Engineering
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Analytical Chemistry
Authors
Burkhard Horstkotte, Carlos M. Duarte, VÃctor Cerdà ,