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Table 3. Determination of Bias for Fluoride <br /> Water Am't Added Am't Found S, So Bias <br /> mg/L mg/L <br /> Reagent 0.26 0.25 0.08 0.11 -3.8 <br /> 0.34 0.29 0.11 -14.7 <br /> 2.12 2.12 0.07 0.12 0.0 <br /> 2.55 2.48 0.14 -2.7 <br /> 6.79 6.76 0.20 0.19 -0.4 <br /> 8.49 8.46 0.30 -0.4 <br /> Drinking 0.26 0.24 0.08 0.05 -7.7 <br /> 0.34 0.34 0.11 0.0 <br /> 2.12 2.09 0.18 0.06 -1.4 <br /> 2.55 2.55 0.16 0.0 <br /> 6.79 6.84 0.54 0.25 +0.7 <br /> 8.49 8.37 0.75 -1.4 <br /> Waste 0.26 0.25 0.15 0.06 -3.8 <br /> 0.34 0.32 0.08 -5.9 <br /> 2.12 2.13 0.22 0.15 +0.5 <br /> 2.55 2.48 0.16 -2.7 <br /> 6.79 6.65 0.41 0.20 -2.1 <br /> 8.49 8.27 0.36 -2.6 <br /> Table 4. Determination of Bias for Chloride <br /> Water Am't Added Am't Found St So Bias <br /> mg/L mg/L % <br /> Reagent 0.78 0.79 0.17 0.29 +1.3 <br /> 1.04 1.12 0.46 +7.7 <br /> 6.50 6.31 0.27 0.14 -2.9 <br /> 7.80 7.76 0.39 -0.5 <br /> 20.8 20.7 0.54 0.62 -0.5 <br /> 26.0 25.9 0.58 -0.4 <br /> Drinking 0.78 0.54 0.35 0.20 -30.8 <br /> 1.04 0.51 0.38 -51.0 <br /> 6.50 5.24 1.35 1.48 -19.4 <br /> 7.80 6.02 1.90 -22.8 <br /> 20.8 20.0 2.26 1.14 -3.8 <br /> 26.0 24.0 2.65 -7.7 <br /> Waste 0.78 0.43 0.32 0.39 -44.9 <br /> 1.04 0.65 0.48 -37.5 <br /> 6.50 4.59 1.82 083 -29.4 <br /> 7.80 5.45 2.02 -30.1 <br /> 20.8 18.3 2.41 1.57 -11.8 <br /> 26.0 23.0 2.50 -11.5 <br /> 300.0-9 August 1991 <br />