U.S. Geological Survey Certificate of Analysis

Coal, Lower Bakerstown, CLB-1

The medium volatile bituminous coal used in the preparation of this USGS reference material was collected in 1982 from the Lower Bakerstown coal bed under the direction of Paul C. Lyons. All values are reported on a whole coal basis.

Recommended Element Concentrations are derived using at least three independent methods of analysis from a minimum of two independent laboratories. Statistical treatment of the data uses the procedures outlined in previous USGS publications (Kane et al. 1990).

Information values are presented when less than three independent methods of analysis were used to determine the final concentration. Standard deviations are provided when at least three independent laboratories reported values in statistical agreement.

Recommended Values | Information Values | Bibliography | Glossary | Notes | Order and Pricing Information

Oxide Wt % ± Oxide µg/g ±
Fe2O3 1.25 0.05 MgO 470 30
CaO 0.22 0.01 Na2O 230 22
K2O 760 50
Element µg/g ± Element µg/g ±
Ba 34 5 Pb 5.1 0.7
Ce 10 1.6 Rb 5.2 0.9
Co 7.0 0.7 Sc 2.0 0.1
Cr 9.7 1.2 V 12 1
Ni 18 2 Zn 48 4

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Information Values

Major Component Wt % ± Oxide µg/g ±
Al2O3 1.51 0.04 P2O5 700 100
SiO2 2.51 0.21 TiO2 780 30
Stot 1.49 0.09
Ash 6.3 0.1
Element µg/g Element µg/g
As 13 Mo 9
Cu 10 Nb 1
Ga 3 Nd 5
Hg 0.2 Sb 1.5
La 5 Se 2
Li 8 Th 1.4
Mn 8 U 0.55

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Wilson, S.A. 1997, Certificate of Analysis Coal, Lower Bakerstown CLB-1: U.S. Geological Survey Open-File Report 97-299, p. 1.

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Symbol Definition
Fe2O3T Total iron concentration expressed as Fe2O3
Stot Total sulfur concentration
Wt % Percent of total element concentration
µg/g Total element concentration exressed as micrograms of element per gram of solid sample
± One standard deviation

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Unless indicated total element concentrations are reported for material on an as-received basis.

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Order and Pricing Information

Placing an Order

USGS reference materials may be obtained directly from Dr. Stephen A. Wilson. The price for each reference material is listed in U.S. dollars and are subject to change. For domestic orders, this cost includes all shipping and handling charges using normal mail delivery by the U.S. Postal Service. For foreign orders, delivery charges will be added to the final bill. Urgent requests for reference materials should be initiated by Fax or e-mail. If required, expedited delivery is available with any additional shipping charges added to the final bill.

To order a USGS Reference Material, please contact Dr. Stephen Wilson or use the downloadable form: Order Form (Word) (22 KB) or Order Form (PDF) (238 KB).

Dr. Stephen A. Wilson
U.S. Geological Survey
Box 25046, MS 964D
Denver, CO 80225
Tel: 303-236-2454
FAX: 303-236-3200 or 303-236-1425
Email: (swilson@usgs.gov)

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