Processing Magazine

EPA Method 415.3 - Determination of TOC in Source Water and Drinking Water

July 3, 2013

Method 415.3 states that the measurement of Total Organic Carbon (TOC ) and DOC must use a TOC instrument that oxidizes organic carbon in the water to create carbon dioxide gas, which is then measurable. The instruments are required to use one of two basic oxidation methods -- either through combustion with an oxidizing gas, or through chemical oxidation with persulfate promoted by either UV or heat catalyzing -- coupled with a non-dispersive infrared (NDIR) detector or a conductivity detector. The ability of the Shimadzu TOC - L to meet the requirements set forth in method 415.3 was assessed.