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Open-File Report 2007–1126

U.S. GEOLOGICAL SURVEY
Open-File Report 2007–1126

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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

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