Trihalomethane yields as a function of precursor molecular weight

Jerald L. Schnoor, University of Iowa
J. L. Nitzschke
R. D. Lucas
J. N. Veenstra


The trihalomethane (THM) yield on a total organic carbon basis was measured as a function of the molecular weight of precursor organics in the Iowa River. Gel permeation chromatography with Sephadex G-75 gel was utilized to separate naturally occurring organics into apparent molecular weight fractions that were subsequently chlorinated to 2 mg/L of free residual and analyzed for THMs.