NUTRIENT ANALYTICAL SERVICES LABORATORY

Limits of Detection

Parameter Parameter Short Name Unit 2024 MDL
Ammonium NH4 mg/L 0.009
Phosphate PO4 mg/L 0.0034
Nitrite NO2 mg/L 0.0009
Nitrite + Nitrate (enzyme) NO23 mg/L 0.0057
Nitrite + Nitrate (cadmium) NO23 mg/L 0.0009
Silicate Si mg/L 0.05
Total Dissolved Nitrogen TDN mg/L 0.05
Total Dissolved Phosphorus TDP mg/L 0.0015
Total and Dissolved Organic Carbon TOC/DOC mg/L 0.21
Total Inorganic Carbon TIC mg/L 0.17
Alkalinity ALK mg/L 0.75
Chloride CI mg/L 0.51
Sulfate SO4 mg/L 0.56
Bromide Br mg/L 0.06
Particulate Carbon PC mg/L 0.0633
Particulate Nitrogen PN mg/L 0.0114
Particulate Carbon Sediment PC % 0.13
Particulate Nitrogen Sediment PN % 0.01
Particulate Phosphorus PP mg/L 0.0010
Particulate Inorganic Phosphorus PIP mg/L 0.0010
Particulate Phosphorus Sediment PP % 0.009
Biogenic Silica BiSi mg/L 0.03
Total Suspended Solids TSS mg/L 2.4
Total Volatile Solids TVS mg/L 0.9
Hardness   mg/L 1.35
Chlorophyll, total Fluorometer CHL-TOT-FLUOR ug/L 0.68
Chlorophyll, active Fluorometer CHL-ACT-FLUOR ug/L 0.69
Phaeophytin Fluorometer CHL-PHAEO-FLUOR ug/L 0.46
Chlorophyll, Spectrophotometer CHL-COR-SPEC ug/L 0.62
Phaeophytin Spectrophotometer CHL-PHAEO-SPEC ug/L 0.74
Chlorophyll, Welschmeyer  CHL-WEL ug/L 0.84
Chlorophyll, Total sediment CHL-SED-TOT mg/m2 0.56
Chlorophyll, phaeophytin sediment CHL-SED-PHAEO mg/m2 1.04
Chlorophyll, active sediment CHL-SED-ACT mg/m2 0.69

* Previous years limits of detection can be provided upon request.