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In a smgle operator smgle laboratory sItuatIon the followmg results were obtamed Sample Matnx DIstIlled Watera Dnnkmg Water RIver Water DomestIc Sewage Raw Sewage Average mg/l 034 065 345 098 079 108 0 7 9 Stand Dev ReI Stnd Dev ±mg/l % aThreereplIcatesfordIstIlledwater SevenreplIcatesforothersamples For four samples the results were compared to the IOdometnc tItratIOn as relatIve accuracy a means of obtammg a Sample Matnx Drmkmg Water RIver Water DomestIC Sewage Raw Sewage Iodometnc DPD TItratIOn FAS TItratIOn mg/l mg/l 091 098 073 079 120 108 075 079 BIbliography % Recovery 1077 1082 900 1053 002 56 0003 05 002 05 001 12 001 14 002 18 003 33 1 Standard Methods for the ExammatIon ofWater and Wastewater, 14th Ed Page 329, Method 409E, "DPD Ferrous TItnmetic Method" (1975) 2 Bender, D F , "Companson of Methods for the DetermmatIOn of Total AVailable ResIdual Chlonne m Vanous Sample Matnces", EP A Report-600/4-78-Q19 3304-3PDF Image | Methods for Chemical Analysis of Water and Wastes
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