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TABLE 1 <br /> INTERFERENCE FREE DETECTION LIMITS <br /> Analyte Chemical Detection Limit in <br /> Abstract Quartz Sand <br /> Series Number (milligrams per kilogram) <br /> Antimony (Sb) 7440-36-0 40 <br /> Arsenic (As) 7440-38-0 40 <br /> Barium (Ba) 7440-39-3 20 <br /> Cadmium (Cd) 7440-43-9 100 <br /> Calcium (Ca) 7440-70-2 70 <br /> Chromium (Cr) 7440-47-3 150 <br /> Cobalt (Co) 7440-48-4 60 <br /> Copper (Cu) 7440-50-8 50 <br /> Iron (Fe) 7439-89-6 60 <br /> Lead (Pb) 7439-92-1 20 <br /> Manganese (Mn) 7439-96-5 70 <br /> Mercury (Hg) 7439-97-6 30 <br /> Molybdenum (Mo) 7439-93-7 10 <br /> Nickel (Ni) 7440-02-0 50 <br /> Potassium (K) 7440-09-7 200 <br /> Rubidium (Rb) 7440-17-7 10 <br /> Selenium (Se) 7782-49-2 40 <br /> Silver (Ag) 7440-22-4 70 <br /> Strontium (Sr) 7440-24-6 10 <br /> Thallium (TI) 7440-28-0 20 <br /> Thorium (Th) 7440-29-1 10 <br /> Tin (Sn) 7440-31-5 60 <br /> Titanium (Ti) 7440-32-6 50 <br /> Vanadium (V) 7440-62-2 50 <br /> Zinc (Zn) 7440-66-6 50 <br /> Zirconium (Zr) 7440-67-7 10 <br /> Source: References 1, 2, and 3 <br /> CD-ROM 6200 - 23 Revision 0 <br /> January 1998 <br />