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9 PrecIsion and Accuracy 9.1 In a single laboratory (EMSL), uSing surface water samples at concentratIOns of 0 1, o18, 027, and 044 mg/l, the standard deviatIOns were ±O 01, ±O 004, ±O 004, and ±O005, respectively At concentratIOns of 13, 40, 58, and 74 mg/l, the standard deViatIOns were ±O OS, ±O OS, ±O 07, and ±O 1, respectively 92 In a Single laboratory (EMSL), uSing surface water samples at concentratIOns of0 18 and 027 mg/l, recovenes were 101% and 106%, respectively At concentratIOns of40 and 5 8 mg/l, the recovenes were 98% and 96%, respectively BiblIography 1 Thompson, J E, and Duthie, J R, "The BlOdegradablhty and Treatment of NTA", Jour WPCF, 40, No 2,306 (1968) 2 Shumate, K S et aI, "NTA Removal by Activated Sludge - Field Study", Ibid, 42, No 4, 631 (1970) 3. Kopp, J F and Kroner, R C, "Trace Metals In Waters of the Umted States", USDI, FWPCA, DPS, 1014 Broadway, Cincinnati, OhIO 45202 4302-4 1111I1PDF Image | Methods for Chemical Analysis of Water and Wastes
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