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DUPLICATE CONTROL SAMPLE REPORT <br />Metals Analysis and Preparation (cont.) <br />Analyte <br />Category: ICP -AT <br />Matrix: AQUEOUS <br />QC Lot: 10 APR 90-A <br />Concentration Units: mg/L <br />Concentration <br />Spiked Measured <br />DCS1 DCS2 <br />Enseco <br />CORNING Company <br />Accuracy Precision <br />Average(%) (RPD) <br />AVG DCS Limits DCS Limit <br />Cadmium <br />0.050 <br />0.0414 <br />0.0396 <br />0.0405 <br />81 <br />80-117 <br />4.2 <br />10 <br />Calcium <br />100 <br />98.7 <br />99.8 <br />99.2 <br />99 <br />85-115 <br />1.1 <br />10 <br />Chromium <br />0.20 <br />0.205 <br />0.209 <br />0.207 <br />103 <br />85-115 <br />1.9 <br />10 <br />Cobalt <br />0.50 <br />0.482 <br />0.487 <br />0.484 <br />97 <br />85-115 <br />1.1 <br />10 <br />Copper <br />0.25 <br />0.247 <br />0.250 <br />0.249 <br />100 <br />85-115 <br />1.2 <br />10 <br />Iron <br />1.0 <br />0.984 <br />0.990 <br />0.987 <br />99 <br />85-115 <br />0.6 <br />10 <br />Lead <br />0.50 <br />0.479 <br />0.506 <br />0.493 <br />99 <br />85-115 <br />5.5 <br />10 <br />Lithium <br />0.20 <br />0.197 <br />0.198 <br />0.197 <br />99 <br />85-115 <br />0.6 <br />10 <br />Magnesium <br />50 <br />48.5 <br />49.1 <br />48.8 <br />98 <br />85-115 <br />1.3 <br />10 <br />Manganese <br />0.50 <br />0.473 <br />0.477 <br />0.475 <br />95 <br />85-115 <br />0.8 <br />10 <br />Molybdenum <br />0.20 <br />0.197 <br />0.198 <br />0.198 <br />99 <br />85-115 <br />0.6 <br />10 <br />Nickel <br />0.50 <br />0.482 <br />0.488 <br />0.485 <br />97 <br />83-115 <br />1.3 <br />10 <br />Potassium <br />50 <br />47.2 <br />48.0 <br />47.6 <br />95 <br />83-115 <br />1.7 <br />10 <br />Selenium <br />2.0 <br />2.08 <br />2.10 <br />2.09 <br />105 <br />85-115 <br />0.6 <br />10 <br />Silver <br />0.050 <br />0.0455 <br />0.0460 <br />0.0458 <br />92 <br />56-116 <br />1.2 <br />35 <br />Sodium <br />100 <br />97.1 <br />98.3 <br />97.7 <br />98 <br />85-115 <br />1.2 <br />10 <br />Thallium <br />2.0 <br />1.90 <br />1.98 <br />1.94 <br />97 <br />84-118 <br />4.0 <br />10 <br />Tin <br />0.40 <br />0.355 <br />0.372 <br />0.363 <br />91 <br />80-115 <br />4.8 <br />15 <br />Titanium <br />0.20 <br />0.197 <br />0.197 <br />0.197 <br />99 <br />85-115 <br />0.1 <br />10 <br />Vanadium <br />0.50 <br />0.481 <br />0.488 <br />0.485 <br />97 <br />82-115 <br />1.3 <br />20 <br />Zinc <br />0.50 <br />0.496 <br />0.502 <br />0.499 <br />100 <br />80-115 <br />1.2 <br />20 <br />Category: SE -FAA -AT <br />Matrix: AQUEOUS <br />QC Lot: 02 APR 90-A <br />Concentration Units: mg/L <br />Selenium <br />0.010 <br />0.00980 <br />0.00960 <br />0.00970 <br />97 <br />80-120 <br />2.1 <br />20 <br />Category: AS -FAA -AT <br />Matrix: AQUEOUS <br />QC Lot: 02 APR 90-A <br />Concentration Units: mg/L <br />Arsenic 0.040 0.0383 0.0364 0.0374 93 84-115 5.1 10 <br />Calculations are performed before rounding to avoid round -off errors in calculated results. <br />11 <br />