Establishment of gold-quartz standard GQS-1
Circular
598
By: Hugh T. Millard, John Marinenko, and John E. McLane
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Abstract
A homogeneous gold-quartz standard, GQS-1, was prepared from a heterogeneous gold-bearing quartz by chemical treatment. The concentration of gold in GQS-1 was determined by both instrumental neutron activation analysis and radioisotope dilution analysis to be 2.61?0.10 parts per million. Analysis of 10 samples of the standard by both instrumental neutron activation analysis and radioisotope dilution analysis failed to reveal heterogeneity within the standard. The precision of the analytical methods, expressed as standard error, was approximately 0.1 part per million. The analytical data were also used to estimate the average size of gold particles. The chemical treatment apparently reduced the average diameter of the gold particles by at least an order of magnitude and increased the concentration of gold grains by a factor of at least 4,000.
Suggested Citation
Millard, H., Marinenko, J., McLane, J.E., 1969, Establishment of gold-quartz standard GQS-1: U.S. Geological Survey Circular 598, iii, 6 p. ;26 cm., https://doi.org/10.3133/cir598.
ISSN: 2330-5703 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Establishment of gold-quartz standard GQS-1 |
| Series title | Circular |
| Series number | 598 |
| DOI | 10.3133/cir598 |
| Year Published | 1969 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | iii, 6 p. ;26 cm. |