AWWA WQTC71341

This powerpoint presentation begins by presenting the project objective: to develop/evaluate a laboratory method for reliable quantification of hydrogen peroxide in 0.5 - 5 mg/L concentration range that is effective in a natural water matrix as well as in the presence of combined chlorine (chloramine). The project approach included the following: a literature review; a bench evaluation of method sensitivity to combined chorine, establish MDL, precision and bias, and to modify/develop the method; and, an interlaboratory evaluation to evaluate method performance in the field between labs, between water sources, and between sample locations. The literature review selected two methods for additional evaluation. The bench level evaluation of titanium oxalate and the Cu/DMP method found that the titanium oxalate method was not impacted by combined chlorine. Finally, the interlab evaluation of the titanium oxalate method resulted in agreement between labs. Includes tables, figures.