Total Organic Carbon (TOC)

Total Organic Carbon (TOC) exists in water in a number of forms. These forms include naturally occuring fulvic and humic acids derived from decaying plant debris and also anthropogenic sources such as pesticides and herbicides. As a chemical class, most forms of organic carbon readily absorb ultraviolet light and their presence in water can be inferred by conventional UVA/UVT measurement (absorbance at 254nM).

The LiquID Station represents a revolutionary new tool for online organic carbon monitoring, in both clean and wastewater systems. The system combines ZAPS own patent-pending spectral methodology with a ruggedized form factor and a low-noise optical platform to produce total organic carbon (TOC) readings that are both selective and sensitive.

Skilled analysts have traditionally measured TOC in a lab using combustion or chemical-oxidation procedures. Both of these techniques rely on converting 100% of all organic molecules to carbon dioxide, which is then measured by absorption in the infrared. Somewhat recently, instrument supply companies have produced automated systems to perform these processes, including cabinet based online analyzers.

These online instruments produce precise and reliable measurements, but require a high level of “care and feeding” to keep them clean, calibrated and supplied with reagents. Maintenance can be more difficult when the instrumenets are used to monitor saline brackish water or seawater.

  • Parameter Detection Range/Sensitivity Accuracy
    Total Organic Carbon (TOC) 0.02 to 100 mg/L ±5%

  • To learn more about the optical approach used by the LiquID to measure TOC please read the How It Works – TOC located in the Library and Resources section of our website.
  • Please Contact Us if you have additional questions about measuring TOC or general inquires into the LiquID Station.