Q City of Winnipeg Environmental Standards Division Winnipeg Analytical Services Branch Standard Operating Procedure Field Testing Chlorine Free amp Total by Colorimetric DPD LIMS SOP 30 Procedure ID CI DPD Version 5 0 Appendices No 15 Issue Date November 4 2014 Total Pages 19 Approved By Courtney Diduck Analytical Services Branch Head Notice Two printed control copies are issued with one copy located in the Analytical Services Laboratory
Chlorine Total Method 10014 DPD Method Pour Thru Cell and OriFlo Filtration ULR 2 to 500 pg L as Cl Scope and Application For detecting trace levels of chlorine and chloramines in clean waters relatively free of color and turbidity USEPA accepted for reporting for wastewater analysis2 1 Adapted from Standard Methods for the Examination of Water and Wastewater 2 U S Patent 5 362 650 covers the procedure U S Patent 5 549 816 covers the OriFlo Filtration System