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Appalachian Laboratory


Water Chemistry Analytical Laboratory

Water Quality

  • Acidity - fixed endpoint potentiometric titration; mg/L CaCO3
  • Acid Neutralizing Capacity (ANC) - Gran multi-point potentiometric titration; µeq/L
  • Alkalinity - fixed endpoint potentiometric titration; mg/L CaCO3
  • Conductivity - conductivity cell and meter; µS/cm
  • Dissolved Inorganic Carbon (DIC) - UV-assisted persulfate; mg/L
  • Dissolved Organic Carbon (DOC) - UV-assisted persulfate; mg/L
  • Hardness - calculation from Mg and Ca concentrations; mg/L CaCO3
  • pH - open or closed system using potentiometry; pH units
  • Turbidity - turbidimeter; NTU
  • Total Carbon (TC) - UV-assisted persulfate; mg/L
  • Total Dissolved Solids (TDS) - gravimetric; mg/L
  • Total Settleable Solids - Imhoff cone; mg/L
  • Total Suspended Solids - gravimetric; mg/L


Nutrients are analyzed on filtered samples with the exception of TN and TP and the particulate fractions.  The difference between TN/TP and TDN/TDP is in how the sample is processed.  TN/TP are analyzed on unfiltered samples and can help to quantify the contribution from particulates in an aqueous sample.  TDN/TDP are analyzed on samples that have been filtered through either a 0.45 µm membrane or Whatman GF/F filter and should reflect the dissolved portion of that nutrient in the sample.  If you are interested in the particulate fraction of N or P in your sample, we recommend directly measuring the N and P particulate fractions, in which a measured volume of sample is collected on a GF/F filter and directly measured for nitrogen and phosphorus.

  • Nitrate (NO3-N) - cadmium reduction colorimetric; mg/L
  • Nitrite (NO2-N) - colorimetric; mg/L
  • Ammonia (Total Ammonia Nitrogen) - saclicylate colorimetric; mg/L
  • Orthophosphate (PO4 as P) - ascorbic acid colorimetric; mg/L
  • Total Nitrogen (TN)/Total Dissolved Nitrogen (TDN) - offline persulfate digestion followed by colorimetric analysis; mg/L
  • Total Phosphorus (TP)/Total Dissolved Phosphorus (TDP) - offline persulfate digestion followed by colorimetric analysis; mg/L
  • Particulate Carbon (PC) - combustion analysis; mg/kg
  • Particulate Nitrogen (PN) - combustion analysis; mg/kg
  • Particulate Phosphorus (PP) - ashing, acid extraction, and colorimetry; mg/kg
  • Particulate Inorganic Phosphorus (PIP) - acid extraction and colorimetry; mg/kg

Metals by ICP-MS

Metals are reported in µg/L and analyzed by ICP-MS using EPA methods 200.8 or 6020 on an Agilent 7900 series system with reaction cell capabilities.  We offer two suites that provide a discount compared to a la carte metals.

We can measure dissolved metals, total metals, or total recoverable metals.  If you are interested in a metal not listed, contact us and we may be able to accommodate you.

  • Priority Metals Suite (Al, As, Ba, Be, Cd, Co, Cu, Fe, Mn, Mo, Pb, Se, V, Zn)
  • Marcellus Shale Suite (Al, Fe, Mn, Ba, Sr)
  • Surface Mining Suite (Al, Fe, Mn)
  • Aluminum (Al)
  • Antimony (Sb)
  • Arsenic (As)
  • Barium (Ba)
  • Beryllium (Be)
  • Boron (B)
  • Cadmium (Cd)
  • Chromium (Cr)
  • Cobalt (Co)
  • Copper (Cu)
  • Iron (Fe)
  • Lead (Pb)
  • Manganese (Mn)
  • Molybdenum (Mb)
  • Nickel (Ni)
  • Selenium (Se)
  • Silver (Ag)
  • Strontium (Sr)
  • Vanadium (V)
  • Zinc (Zn)

Soil & Solid Sample Analysis

We have the capability to measure a variety of common soil and solid sample analytes - both extractable and acid degested constituents.  Please contact us so that we can provide you with custom options.  Here are just a few of the possibilities:

  • Organic fraction/LOI
  • Nitrate and Exhangeable Ammonium Nitrogen - colorimetry; mg/kg
  • Total Carbon - combustion; %C
  • Total Nitrogen - combustion; %N
  • Mechlich III-Extractable Elements
  • Organic Carbon
  • Acid-digested cations
  • Acid-digested metals
  • Extractable P