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Using sequential injection analysis to improve system and data reliability of online methods: determination of ammonium and phosphate in coastal waters.

Frank C, Schroeder F - J Autom Methods Manag Chem (2007)

Bottom Line: These measures are advantageous during method development and validation and can be used to verify the system performance on a regular base to reduce the amount of erroneous results.No changes in the flow system are necessary and the sample throughput is only slightly reduced.Results from a campaign in summer 2005 are shown.

View Article: PubMed Central - PubMed

Affiliation: GKSS Research Centre, Institute for Coastal Research, Max-Planck-Strasse, 21502 Geesthacht, Germany.

ABSTRACT
This article summarises the advantages of the sequential injection analysis (SIA) for the online determination of nutrients in coastal waters. It concentrates on techniques to improve the reliability of the gained data by continuously monitoring one or more standards and on the advantages of online standard additions and offline determination of manually collected samples with the online SIA system. These measures are advantageous during method development and validation and can be used to verify the system performance on a regular base to reduce the amount of erroneous results. No changes in the flow system are necessary and the sample throughput is only slightly reduced. These techniques have been applied to a SIA system which is able to simultaneously determine ammonium and phosphate at a rate of more than 100 samples per hour each and detection limits (3sigma) of 0.06 muM and 0.05 muM. Results from a campaign in summer 2005 are shown.

No MeSH data available.


Succession of ammonium load, readout, and phosphate determination steps.
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Related In: Results  -  Collection


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Figure 2: Succession of ammonium load, readout, and phosphate determination steps.

Mentions: A combined phosphate and ammonium determination starts with anammonium readout step which is used to determine the fluorescenceof the reagent-sample segment. This segment was loaded into theactual reaction loop exactly 60 seconds (three cycles) afore (seeFigure 2).


Using sequential injection analysis to improve system and data reliability of online methods: determination of ammonium and phosphate in coastal waters.

Frank C, Schroeder F - J Autom Methods Manag Chem (2007)

Succession of ammonium load, readout, and phosphate determination steps.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC1828606&req=5

Figure 2: Succession of ammonium load, readout, and phosphate determination steps.
Mentions: A combined phosphate and ammonium determination starts with anammonium readout step which is used to determine the fluorescenceof the reagent-sample segment. This segment was loaded into theactual reaction loop exactly 60 seconds (three cycles) afore (seeFigure 2).

Bottom Line: These measures are advantageous during method development and validation and can be used to verify the system performance on a regular base to reduce the amount of erroneous results.No changes in the flow system are necessary and the sample throughput is only slightly reduced.Results from a campaign in summer 2005 are shown.

View Article: PubMed Central - PubMed

Affiliation: GKSS Research Centre, Institute for Coastal Research, Max-Planck-Strasse, 21502 Geesthacht, Germany.

ABSTRACT
This article summarises the advantages of the sequential injection analysis (SIA) for the online determination of nutrients in coastal waters. It concentrates on techniques to improve the reliability of the gained data by continuously monitoring one or more standards and on the advantages of online standard additions and offline determination of manually collected samples with the online SIA system. These measures are advantageous during method development and validation and can be used to verify the system performance on a regular base to reduce the amount of erroneous results. No changes in the flow system are necessary and the sample throughput is only slightly reduced. These techniques have been applied to a SIA system which is able to simultaneously determine ammonium and phosphate at a rate of more than 100 samples per hour each and detection limits (3sigma) of 0.06 muM and 0.05 muM. Results from a campaign in summer 2005 are shown.

No MeSH data available.