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A miniature and field-applicable multipumping flow analyzer for ammonium monitoring in seawater with fluorescence detection
- Source :
-
Talanta . Jul2011, Vol. 85 Issue 1, p380-385. 6p. - Publication Year :
- 2011
-
Abstract
- 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 13nmol/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 32h−1 at average standard deviation of 3%. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00399140
- Volume :
- 85
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 61172675
- Full Text :
- https://doi.org/10.1016/j.talanta.2011.03.078