Open-File Report 2007–1126
U.S. GEOLOGICAL SURVEY
Open-File Report 2007–1126
Table 2. Lower reporting limits for analyses by 10-element ICP-AES in the U.S. Gelogical Suvey and XRAL laboratories.
[Abbreviations: ICP-AES, inductively coupled plasma atomic emission spectrometry; ppm, parts per million]
Element | Lower reporting limit (ppm) | ||
---|---|---|---|
XRAL | U.S. Geological Survey | ||
Through 1993 |
From 1994 |
||
Antimony, Sb | 1 | 0.67 | 1.0 |
Arsenic, As | 1 | .67 | 1.0 |
Bismuth, Bi | 1 | .67 | 1.0 |
Cadmium, Cd | .05 | .05 | .05 |
Copper, Cu | .05 | .05 | .05 |
Gold, Au | .1 | .1 | .1 |
Lead, Pb | 1 | .67 | 1.0 |
Molybdenum, Mo | .1 | .06 | 1.0 |
Silver, Ag | .08 | .067 | .08 |
Zinc, Zn | .05 | .03 | .03 |