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10 PrecIsion and Accuracy 101 Thirty-threeanalystsmnmeteenlaboratorIesanalyzednaturalwatersamplescontammg exact mcrements oforgamc phosphate, with the followmg results Increment as Total Phosphorus mg P/Itter 0110 0132 0772 0882 PreCISIon as Standard DeVIatIOn Bias, mg P/Itter % 0033 +309 0051 +1199 0130 +296 0128 -092 Accuracy as (FWPCA Method Study 2, NutrIent Analyses) 102 Tv.enty-slx analysts m SIXteen laboratOrIes analyzed natural water samples contamIng exact Increments oforthophosphate, WIth the followmg results Increment as Orthophosphate mg Plliter PreCISIon as Standard DeVIatIOn mg Plliter Accuracy as 0029 0010 -495 0038 0008 -600 0335 0018 -275 0383 0023 -176 (FWPCA Method Study 2, NutrIent Analyses) BIblIography 1 Murphy, J , and RIley, J , "A modified SIngle SolutIOn for the DetermInatIOn of Phosphate In Natural Waters", Anal Chim Acta, 27, 31 (1962) 2. Gales, M, Jr, Juhan, E, and Kroner, R, "Method for QuantItatIve Determmatton ofTotal Phosphorus In Water", Jour AWWA, 58, No 10,1363 (1966) 3. Annual Book of ASTM Standards, Part 31, "Water", Standard 0515-72, Method A, p 389 (1976) 4 Standard Methods for the EXamInatIOn ofWater and Wastewater, 14th EdItIOn, p 476 and 481, (1975) 3652-6 BIas, % Bias, mg Plliter -0001 -0002 -0009 -0007 BIas mg P/hter +0003 +0016 +0023 -0008PDF Image | Methods for Chemical Analysis of Water and Wastes
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