Wet Chemistry Testing

Various methods are used to determine the concentrations of the wet chemistry tests.  Most methods are listed in the Federal Register. Please contact us if you have questions regarding method or certification requirements for your project.

 

Each analysis has specific requirements for bottle type, sample volume, preservations and holding times.

 

For example, Alkalinity should always have its own bottle. In contrast, Ammonia, Total Phosphorous, COD and TKN are all preserved in the same way and can share a container.

 

Analysis for Anions only requires one container, but the allowed holding times vary. Bromide and Sulfate can be analyzed for up to 28 days from sampling, while Nitrate, Nitrite and ortho-Phosphate analysis must be completed within 48 hours of collection.

 

The following wet chemistry determinations are commonly performed:

Acidity
Alkalinity, Bicarbonate
Alkalinity, Carbonate
Alkalinity, total (as CaCO3)
Ammonia as N
Biochemical Oxygen Demand (BOD)
Bromide
carbon dioxide
Carbonaceous BOD
Chemical Oxygen Demand (COD)
Chloride
Chromium, Hexavalent
Chromium, Trivalent
Conductivity
Cyanide (free)
Cyanide, total
Dissolved Oxygen
Flash Point (closed cup)
Fluoride
Free Liquid (paint filter)
Ignitability
Nitrate-N
Nitrite/Nitrate-N
Nitrite-N
Total Organic Nitrogen (TON)
Total Nitrogen (TN)
Odor
Oil and Grease
Oil and Grease Mineral/Synthetic
ortho-phosphate (as P)
Oxygen Uptake Rate
Permanganate Demand (as KMnO4)
pH
Phenols (total)
Soluble Biochemical Oxygen Demand (BOD)
Soluble Chemical Oxygen Demand (COD)
Sulfate
Sulfide-soluble
Sulfite
Surfactants (MBAS)
Suspended Sediment Concentration (SSC)
Total Dissolved Solids (TDS)
Total Kjeldahl Nitrogen (TKN)
Total Phosphorus as P
Total Solids (TS)
Total Suspended Solids (TSS)
Total Volatile Solids (TVS)
Turbidity
Volatile Matter
Volatile Suspended Solids (VSS)

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