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A Com,ng Campany <br /> DUPLICATE CONTROL SAMPLE REPORT <br /> Metals Analysis and Preparation <br /> Concentration Accuracy Precision <br /> Analyte Spiked Measured Average m RPD) <br /> DCS1 1DCS2 AVG DCS Limits Limit <br /> Category: ICP-S <br /> Matrix: SOIL <br /> QC Lot: 16 JUL 91-A <br /> Concentration Units: mg/kg <br /> Aluminum 200 193 195 194 97 84-115 1.0 11 <br /> Antimony 50 44.4 45.5 45.0 90 81-115 2.6 10 <br /> Arsenic 50 44.6 44.8 44.7 89 82-115 0.5 10 <br /> 199 99 85-115 0.7 10 <br /> Barium 200 198 199 <br /> Beryllium 5.0 4.86 4.92 4.89 98 70-110 1.3 10 <br /> Boron 100 99.3 98.4 98.9 99 85-115 1.0 10 <br /> Cadmium 5.0 4.76 4.42 4.59 92 81-118 7.4 15 <br /> Calcium 10000 10200 10300 10300 103 85-115 1.2 10 <br /> Chromium 20 18 6 19.0 18.8 94 84-115 2.1 17 <br /> Cobalt 50 47.1 47.8 47.5 95 80-115 1.5 10 <br /> 25 25.9 25.8 25.8 103 81-115 0.5 10 <br /> Copper <br /> Iron 100 95.5 97.2 96.4 96 85-115 1.8 14 <br /> Lead 50 45.2 45.9 45.6 91 80-115 1.4 11 <br /> Lithium 20.0 21 .1 21.3 21 .2 106 85-115 1 .0 10 <br /> 5000 5060 5100 5080 102 85-115 0.8 10 <br /> Magnesium <br /> Manganese 50 0 46.2 47.1 46.7 93 80-115 1.9 10 <br /> Mol ybdenum 20.0 18.3 18.8 18.6 93 85-115 2.6 10 <br /> Nickel 50.0 47.3 48.3 47.8 96 80-115 2.0 10 <br /> Potassium 5000 5020 5050 5030 101 82-115 0.5 10 <br /> Selenium 200.0 186 184 185 93 84-115 1 .1 10 <br /> Solver 5.0 4 06 4.25 4. 16 83 62-115 4.6 10 <br /> 10 <br /> Sodium 000 10100 10200 10200 102 85-115 0.4 10 <br /> 200 192 194 193 96 68-110 1 .0 10 <br /> Thallium <br /> Tin 400 348 351 350 87 80-122 0 9 10 <br /> Titanium 200 0 185 187 186 93 85-115 0.9 10 <br /> Vanadium 50.0 47.0 48.1 47.6 95 85-115 2.2 10 <br /> Zinc 50 43.6 44 5 44.1 88 82-115 1 .9 10 <br /> Calculations are performed before rounding to avoid round-off errors in calculated results. <br /> IDi <br />