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Establishment of gold-quartz standard GQS-1

Circular 598

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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.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Establishment of gold-quartz standard GQS-1
Series title:
Circular
Series number:
598
Edition:
-
Year Published:
1969
Language:
ENGLISH
Publisher:
[U.S. Geological Survey],
Description:
iii, 6 p. ;26 cm.