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TABLE 7 <br /> ACCURACY <br /> Instrument <br /> TN 9000 TN Lead Analyzer X-MET 920 SiLi Detector XL S ectrum Analyzer <br /> Analyte n Range Mean SD n Range Mean SD n Range Mean SD n Range Mean SD <br /> of % Rec. of % of % of % <br /> % Rec. % Rec. Rec. % Rec. Rec % Rec. Rec. <br /> Sb 2 100-149 124.3 NA - -- -- -- -- - -- -- -- -As 5 68-115 92.8 17.3 5 44-105 83.4 23.2 4 9.7-91 47.7 39.7 5 38-535 189.8 206 <br /> Ba 9 98-198 135.3 36.9 -- -- -- 9 18-848 168.2 262 - -- - -- <br /> Cd 2 99-129 114.3 NA -- -- -- -- 6 81-202 110.5 45.7 - -- - -- <br /> Cr 2 99-178 138.4 NA -- -- -- -- 7 22-273 143.1 93.8 3 98-625 279.2 300 <br /> Cu 8 61-140 95.0 28.8 6 38-107 79.1 27.0 11 10-210 111.8 72.1 8 95-480 203.0 147 <br /> Fe 6 78-155 103.7 26.1 6 89-159 102.3 28.6 6 1 48-94 80.4 16.2 6 26-187 108.6 52.9 <br /> Pb 11 66-138 98.9 19.2 11 68-131 97.4 18.4 12 23-94 72.7 20.9 13 80-234 107.3 1 39.9 <br /> Mn 4 81-104 93.1 9.70 3 92-152 1 113.1 33.8 -- -- -- -- -- - -- <br /> Ni 3 99-122 109.8 12.0 -- -- -- -- - - -- 3 57-123 87.5 33.5 <br /> Sr 8 110-178 132.6 23.8 -- -- -- -- -- 1 - 7 86-209 125.1 39.5 <br /> Zn 11 41-130 94.3 24.0 10 81-133 100.0 19.7 12 46-181 106.6 1 34.7 11 31-199 1 94.6 42.5 <br /> Source: Reference 4 <br /> n Number of samples that contained a certified value for the analyte and produced a detectable concentration from the FPXRF instrument. <br /> SD Standard deviation. <br /> NA Not applicable; only two data points, therefore, a SD was not calculated. <br /> %Rec. Percent recovery. <br /> -- No data. <br /> CD-ROM 6200 -28 Revision 0 <br /> January 1998 <br />