TOC monitoring
23 Sep 2014
Edinburgh Sensors is pleased to announce its sensors are now being integrated into a number of systems for Total Organic Carbon (TOC) measurement.
TOC represents a measure of the amount of carbon, in a water sample, that has a biological source, including oil.
The Total Inorganic Carbon (TIC) is typically removed from a sample using acidification and/or purging before oxidising the remaining organic carbon in the water sample to carbon dioxide and then measuring the amount of carbon dioxide produced.
There are several methods of oxidising the organic carbon employing: - oxygen, wet chemistry, UV radiation or heat to produce the carbon dioxide.
Whichever method is used, the result is carbon dioxide dissolved in a carrier gas, commonly oxygen.
The carrier gas is passed through the Edinburgh Sensors NDIR gas sensor to measure the carbon dioxide content.
The higher the carbon dioxide concentration the higher the TOC level and the less clean the water sample is.
Depending on the cleanliness of the water under test and the methods used different carbon dioxide concentrations are to be expected in the carrier gas, from wastewater with mgms/l of organic carbon giving % levels of carbon dioxide to drinking water with y ?gms/l giving ppm’s of carbon dioxide in the carrier gas.
For more information, please contact: +44 (0)1506 425 300 or visit: www.edinburghsensors.com
