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r nSeC0 <br />DUPLICATE CONTROL SAMPLE REPORT <br />Metals Analysis and Preparation (cont.) <br />Concentration Accuracy Precision <br />Analyte Spiked Measured Average(%) (RPD) <br />DCS1 DCS2 AVG DCS Limits DCS Limit <br />Category: ICP -A <br />Matrix: AQUEOUS <br />QC Lot: 23 OCT 89-B <br />Concentration Units: mg/L <br />Cadmium <br />0.050 <br />0.0480 <br />0.0480 <br />0.0480 <br />96 <br />80-117 <br />0.0 <br />10 <br />Calcium <br />100 <br />102 <br />103 <br />102 <br />103 <br />85-115 <br />1.0 <br />10 <br />Chromium <br />0.20 <br />0.205 <br />0.208 <br />0.206 <br />103 <br />85-115 <br />1.5 <br />10 <br />Cobalt <br />0.50 <br />0.496 <br />0.499 <br />0.498 <br />100 <br />85-115 <br />0.6 <br />10 <br />Copper <br />0.25 <br />0.262 <br />0.263 <br />0.262 <br />105 <br />85-115 <br />0.4 <br />10 <br />Iron <br />1.0 <br />0.987 <br />1.00 <br />0.994 <br />99 <br />85-115 <br />1.3 <br />10 <br />Lead <br />0.50 <br />0.488 <br />0.501 <br />0.494 <br />99 <br />85-115 <br />2.6 <br />10 <br />Lithium <br />0.20 <br />0.201 <br />0.207 <br />0.204 <br />102 <br />85-115 <br />2.9 <br />10 <br />Magnesium <br />50 <br />49.2 <br />49.3 <br />49.2 <br />99 <br />85-115 <br />0.2 <br />10 <br />Manganese <br />0.50 <br />0.493 <br />0.495 <br />0.494 <br />99 <br />85-115 <br />0.4 <br />10 <br />Molybdenum <br />0.20 <br />0.193 <br />0.196 <br />0.194 <br />97 <br />85-115 <br />1.5 <br />10 <br />Nickel <br />0.50 <br />0.502 <br />0.502 <br />0.502 <br />100 <br />83-115 <br />0.0 <br />10 <br />Potassium <br />50 <br />49.8 <br />50.1 <br />50.0 <br />100 <br />83-115 <br />0.6 <br />10 <br />Selenium <br />2.0 <br />2.00 <br />2.04 <br />2.02 <br />101 <br />85-115 <br />2.0 <br />10 <br />Silver <br />0.050 <br />0.0470 <br />0.0470 <br />0.0470 <br />94 <br />56-116 <br />0.0 <br />35 <br />Sodium <br />100 <br />100 <br />101 <br />100 <br />101 <br />85-115 <br />1.0 <br />10 <br />Thallium <br />2.0 <br />2.01 <br />2.06 <br />2.04 <br />102 <br />84-118 <br />2.5 <br />10 <br />Tin <br />4.00 <br />3.79 <br />3.71 <br />3.75 <br />94 <br />80-115 <br />2.1 <br />15 <br />Titanium <br />0.20 <br />0.187 <br />0.188 <br />0.188 <br />94 <br />85-115 <br />0.5 <br />10 <br />Vanadium <br />0.50 <br />0.492 <br />0.495 <br />0.494 <br />99 <br />82-115 <br />0.6 <br />20 <br />Zinc <br />0.50 <br />0.497 <br />0.498 <br />0.498 <br />100 <br />80-115 <br />0.2 <br />20 <br />Category: PB -FAA -A <br />Matrix: AQUEOUS <br />QC Lot: 23 OCT 89-A <br />Concentration Units: mg/L <br />Lead 0.020 0.0219 0.0222 0.0220 110 82-115 1.4 11 <br />Category: TL -FAA -A <br />Matrix: AQUEOUS <br />QC Lot: 23 OCT 89-A <br />Concentration Units: mg/L <br />Thallium 0.050 0.0515 0.0509 0.0512 102 80-120 1.2 10 <br />Calculations are performed before rounding to avoid round -off errors in calculated results. <br />C <br />11 <br />