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Sample Weight: 15 g

Summary

Method 21 Elements and Reporting Limits
Element Concentration (low) Concentration (high)
Ag, Silver 5 ppm 1%
Au, Gold 5 ppb 50 ppm
Ba, Barium 100 ppm 5%
Br, Bromine 1 ppm 1000 ppm
Ca, Calcium 1% 50%
Ce, Cerium 3 ppm 1%
Cr, Chromium 10 ppm 5%
Cs, Cesium 3 ppm 1%
Co, Cobalt 5 ppm 0.5%
Eu, Europium 0.02 ppm 0.1%
Fe, Iron 0.1% 50%
Hf, Hafnium 1 ppm 0.2%
Hg, Mercury 1 ppm 1000 ppm
Ir, Iridium 20 ppb 10 ppm
La, Lanthanum 1 ppm 0.5%
Lu, Lutetium 0.05 ppm 0.1%
Mo, Molybdenum 5 ppm 0.5%
Na, Sodium 0.05% 20%
Nd, Neodymium 10 ppm 1%
Ni, Nickel 100 ppm 10%
Ru, Ruthenium 30 ppm 0.5%
Sb, Antimony 0.2 ppm 0.5%
Sc, Scandium 1 ppm 0.5%
Se, Selenium 5 ppm 0.5%
Sm, Samarium 0.5 ppm 0.5%
Sr, Strontium 500 ppm 5%
Ta, Tantalum 1 ppm 0.1%
Tb, Terbium 0.5 ppm 0.1%
Th, Thorium 0.5 ppm 0.2%
U, Uranium 0.5 ppm 0.1%
W, Tungsten 4 ppm 0.5%
Y, Yttrium 0.5 ppm 1%
Zn, Zinc 50 ppm 10%

Analytical Performance

Data will be deemed acceptable if recovery of each element is ±15% at five times the Lower Limit of Determination (LOD) and the calculated Relative Standard Deviation (RSD) of duplicate samples is no greater than 15%.

Project Contact

Jaime Azain
Phone: 303-236-9376
Email: jsazain@usgs.gov
Central Mineral and Environmental Resources Science Center

Mineral Resources Program Science Priority

The use of firm, trade, and brand names is for identification purposes only and does not constitute endorsement by the U.S. government.

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