Services & Capabilities
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:
Alkalinity, total (as CaCO3)
Ammonia as N
Biochemical Oxygen Demand (BOD)
Chemical Oxygen Demand (COD)
Flash Point (closed cup)
Free Liquid (paint filter)
Total Organic Nitrogen (TON)
Total Nitrogen (TN)
Oil and Grease
Oil and Grease Mineral/Synthetic
ortho-phosphate (as P)
Oxygen Uptake Rate
Permanganate Demand (as KMnO4)
Soluble Biochemical Oxygen Demand (BOD)
Soluble Chemical Oxygen Demand (COD)
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)
Volatile Suspended Solids (VSS)