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Enseco <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Special Services - Low Resolution Mass Spectrometry <br /> r <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Avera ge(%) (RPD) <br /> DCS1 DCS2 AVG DCS Limits DCS Limit <br /> i <br /> Category: DXNFUR-S <br /> Matrix: SOLID <br /> QC Lot: 02 MAR 92-A <br /> . Concentration Units: ng <br /> f 2,3,7,8-TCDF 10 8.80 8.70 8.75 88 60-140 1.1 50 <br /> 1,2,3,7,8-PeCDF 10 8.80 8.70 8.75 88 60-140 1.1 50 <br /> 1,2,3,4,7,8-HxCDF 10 5.90 4.80 5.35 54 60-140 21 50 <br /> 1,2,3,4,6,7,8-HpCDF 10 4.70 3.40 4.05 41 60-140 32 50 <br /> OCDF 50 36.0 48.0 42.0 84 60-140 29 50 <br /> 2,3,7,8-TCDD 10 7.70 7.70 7.70 77 60-140 0.0 50 <br /> 1,2,3,7,8-PeCDD 10 9.10 8.90 9.00 90 60-140 2.2 50 <br /> 1,2,3,4,7,8-HxCDD 10. 7.70 7.40 7.55 76 60-140 4.0 50 <br /> 1,2,3,4,6,7,8-HpCDD 10 7.20 7.30 7.25 73 60-140 1.4 50 <br /> . OCDD 50 32.0 26.0 29.0 58 60-140 21 50 <br /> �. Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> i . <br /> t� <br /> �i <br />