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Sample Weight: 2 g

Summary

  • Stage 1 – Extraction of absorbed, exchanged and carbonate bound metals
  • Stage 2 – Extraction of metals bound to hydrous iron and manganese oxides
  • Stage 3 – Extraction of metals bound to crystalline iron oxides
  • Stage 4 – Extraction of metals in sulfide phase
  • Stage 5 – Extraction of residual fraction
Method 30 Elements and Reporting Limits
Element Concentration Range
Ag, Silver 0.01 ppm 100 ppm
Al, Aluminum 0.01% 25%
As, Arsenic 0.1 ppm 1%
Au, Gold 0.005 ppm 10 ppm
B, Boron 5 ppm 0.1%
Ba, Barium 1 ppm 1%
Be, Beryllium 0.05 ppm 0.1%
Bi, Bismuth 0.01 ppm 0.1%
Ca, Calcium 0.01% 25%
Cd, Cadmium 0.01 ppm 0.1%
Ce, Cerium 0.01 ppm 0.1%
Co, Cobalt 0.1 ppm 1%
Cr, Chromium 0.5 ppm 1%
Cs, Cesium 0.05 ppm 0.1%
Cu, Copper 0.5 ppm 1%
Fe, Iron 0.01% 30%
Ga, Gallium 0.05 ppm 0.1%
Ge, Germanium 0.05 ppm 0.1%
Hf, Hafnium 0.02 ppm 0.1%
Hg, Mercury 0.01 ppm 100 ppm
In, Indium 0.005 ppm 0.1%
K, Potassium 0.01% 25%
La, Lanthanum 0.1 ppm 0.1%
Li, Lithium 0.1 ppm 1%
Mg, Magnesium 0.01% 25%
Mn, Manganese 1 ppm 1%
Mo, Molybdenum 0.05 ppm 1%
Nb, Niobium 0.05 ppm 0.1%
Ni, Nickel 0.5 ppm 1%
P, Phosphorous 10 ppm 25%
Pb, Lead 0.1 ppm 1%
Rb, Rubidium 0.1 ppm 0.1%
Re, Rhenium 0.001 ppm 0.1%
S, Sulfur 0.01% 30%
Sb, Antimony 0.05 ppm 0.1%
Sc, Scandium 0.1 ppm 0.1%
Se, Selenium 0.2 ppm 0.1%
Sn, Tin 0.2 ppm 0.1%
Sr, Strontium 0.2 ppm 0.1%
Ta, Tantalum 0.01 ppm 0.1%
Te, Tellurium 0.01 ppm 0.1%
Th, Thorium 0.1 ppm 0.1%
Ti, Titanium 0.01% 25%
Tl, Thallium 0.01 ppm 0.1%
U, Uranium 0.05 ppm 0.1%
V, Vanadium 0.5 ppm 0.1%
W, Tungsten 0.05 ppm 0.1%
Y, Yttrium 0.05 ppm 0.1%
Zn, Zinc 0.5 ppm 1%
Zr, Zirconium 0.5 ppm 0.1%

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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