Methods for Environmental Water Assays (Fresh, Brackish, Salt Waters)

The FIAlab-2500/2600/2700 flow injection systems are ideally suited for the low/mid/high analyte ranges of fresh/waste water applications, as well as the ultra low detection limit requirements typical of many seawater samples.

Critical to seawater assays, FIAlab offers a long path flowcell with an optical path length of 50 cm - and an internal volume of only ~100 microliters.  This allows for measurements in the low microgram/liter range.  For ammonia consider the ultra sensitive fluorometric approach.  Please see  discussions on marine assay considerations.

FIAlab Methods for Seawater, Lakes, Streams, Aquaculture Ponds, Waste Waters, and Runoff

The following links represent a sampling of available methods compatible with the FIAlab-2500/2600/2700 flow injection systems.  Please contact FIAlab for information on other available methods.  Variations to some of these methods have been developed for both lower and higher ranges than listed here.  
Analyte Matrix/Method
Nitrate/Nitrite Fresh/Salt Waters
Ammonia (Salicylate Method) Fresh/Salt Waters
Ammonia (Gas Diffusion Method) Fresh/Salt Waters, Certain Extracts
Ammonia Ultra Low (Fluorometric Method) Fresh/Salt Waters
Total Nitrogen/Phosphorous (Persulfate Batch Method) Batch Digested Samples
Total Kjeldahl Nitrogen (TKN, Acid Batch Method) Batch Digested Samples
Total Nitrogen (In-line) In-line UV Digestion
Ortho Phosphate Fresh/Salt Waters
Total Phosphorus (Acid Batch Method)  Batch Digested Samples
Total Phosphorus (In-line) In-line UV Digestion
Iron Fresh/Salt Waters
Chloride Waters, Wastewaters
Sulfate Waters, Wastewaters
Silicate Waters, Wastewaters
Boron Waters, Wastewaters, Soil KCL Extracts
Potassium Waters (using FIA and Flame Photometer)


EPA Compatible Methods for Assorted Fresh Waters

The following EPA methods are compatible with the FIAlab design.   Other compatible EPA  methods are also available, please contact us with  your specific requirements.
Analyte EPA Method
Nitrate/Nitrite Method 353.2
Ammonia Method 350.1
Total Kjeldahl Nitrogen (TKN) Method 351.2
Ortho Phosphate Method 365.1
Total Phosphorus Method 365.4
Chloride Method 140.4
Sulfate Method 375.2


Please email or phone FIAlab Instruments for additional product information.
Email:
fialab@flowinjection.com, Voice: 425-376-0450 or 1-800-963-1101,  Fax: 425-376-0451