Standard Test Method for Determination of Silver in Copper Concentrates by Flame Atomic Absorption Spectrometry

SCOPE
1.1 This test method covers the determination of silver in the range of 50 g/g to 1000 g/g by acid dissolution of the silver and measurement by atomic absorption spectrophotometry. Copper concentrates are internationally traded within the following concentration ranges:ElementUnit Concentration RangeAluminum%0.05to 2.50Antimony%0.0001to 4.50Arsenic%0.01to 0.50Barium%0.003to 0.10Bismuth%0.001to 0.16Cadmium%0.0005to 0.04Calcium%0.05to 4.00Carbon %0.10to 0.90Chlorine%0.001to 0.006Chromium%0.0001to 0.10Cobalt%0.0005to 0.20Copper%10.0to 44.0Fluorine%0.001to 0.10Gold g/g1.40to100.0Iron %12.0to30.0Lead %0.01to1.40Magnesium%0.02to 2.00Manganese%0.009to 0.10Mercuryg/g0.05to 50.0Molybdenum% 0.002to 0.25Nickel%0.0001to 0.08Silicon%0.40to 20.0Silverg/g18.0to 8000Sulfur%10.0to 36.0Tin %0.004to0.012Zinc %0.005to4.30
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to its use./p>

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ASTM E1898-02 - Standard Test Method for Determination of Silver in Copper Concentrates by Flame Atomic Absorption Spectrometry
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Designation:E1898–02
Standard Test Method for
Determination of Silver in Copper Concentrates by Flame
1
Atomic Absorption Spectrometry
This standard is issued under the fixed designation E 1898; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 29 Practice For Using Significant Digits in Test Data to
3
Determine Conformance With Specifications
1.1 This test method covers the determination of silver in
E 50 Practices for Apparatus, Reagents and Safety Precau-
the range of 50 µg/g to 1000 µg/g by acid dissolution of the
3
tions for Chemical Analysis of Metals
silver and measurement by atomic absorption spectrophotom-
E 135 Terminology Relating to Analytical Chemistry for
etry. Copper concentrates are internationally traded within the
3
Metals, Ores, and Related Materials
following concentration ranges:
4
E 663 Practice for Flame Atomic Absorption Analysis
Element Unit Concentration Range
E 882 Guide for Accountability and Quality Control in the
Aluminum % 0.05 to 2.50
3
Antimony % 0.0001 to 4.50
Chemical Analysis of Metals
Arsenic % 0.01 to 0.50
E 1024 Guide for Chemical Analysis of Metals and Metal
Barium % 0.003 to 0.10
Bearing Ores by Flame Atomic Absorption Spectropho-
Bismuth % 0.001 to 0.16
3
Cadmium % 0.0005 to 0.04
tometry
Calcium % 0.05 to 4.00
E 1601 Practice for Conducting an Interlaboratory Study to
Carbon % 0.10 to 0.90
4
Evaluate the Performance of an Analytical Method
Chlorine % 0.001 to 0.006
Chromium % 0.0001 to 0.10
E 1763 Guide for Interpretation and Use of Results from
Cobalt % 0.0005 to 0.20
3
Interlaboratory Testing of Chemical Analysis Methods
Copper % 10.0 to 44.0
Fluorine % 0.001 to 0.10
3. Terminology
Gold µg/g 1.40 to 100.0
Iron % 12.0 to 30.0
3.1 Definitions—For definitions of terms used in this test
Lead % 0.01 to 1.40
Magnesium % 0.02 to 2.00 method, refer to Terminology E 135.
Manganese % 0.009 to 0.10
Mercury µg/g 0.05 to 50.0
4. Summary of Test Method
Molybdenum % 0.002 to 0.25
4.1 The analyst has the option of either digesting the sample
Nickel % 0.0001 to 0.08
Silicon % 0.40 to 20.0
in nitric and hydrochloric acids or nitric and perchloric acids,
Silver µg/g 18.0 to 8000
depending on their preference and equipment availability. The
Sulfur % 10.0 to 36.0
filtered solutions are aspirated into an air-acetylene flame of an
Tin % 0.004 to 0.012
Zinc % 0.005 to 4.30
atomic absorption spectrophotometer. Spectral energy at ap-
proximately 328.1 nm from a silver hollow cathode lamp is
1.2 This standard does not purport to address all of the
passed through the flame and the absorbance is measured. This
safety concerns, if any, associated with its use. It is the
absorbance is compared with the absorbance of a series of
responsibility of the user of this standard to establish appro-
standard calibration solutions.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to its use.
5. Significance and Use
2. Referenced Documents 5.1 In the primary metallurgical processes used by the
mineral processing industry for copper bearing ores, copper
2.1 ASTM Standards:
2
and silver associated with sulfide mineralization are concen-
D 1193 Specification for Reagent Water
trated by the process of flotation for recovery of the metals.
5.2 This test method is intended to be a referee method for
1
This test method is under the jurisdiction of ASTM Committee E01 on the determination of silver in copper concentrates. It is as-
Analytical Chemistry for Metals, Ores and Related Materials and is the direct
sumed that all who use this procedure will be trained analysts
responsibility of Subcommittee E01.02 on Metal Bearing Ores, Concentrates and
Related Metallurgical Materials.
Current edition approved May 10, 2002. Published June 2002. Last previous
3
edition E 1898 - 97. Annual Book of ASTM Standards, Vol 03.05.
2 4
Annual Book of ASTM Standards, Vol 11.01. Annual Book of ASTM Standards, Vol 03.06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E1898–02
capable of performing common laboratory procedures skill- 10. Sampling and Sample Preparation
fully and safely. It is expected that work will be performed in
10.1 The gross sample must be collected and prepared so
a properly equipped laboratory and that proper waste disposal
that it is representative of the lot of copper concentrate to be
procedures will be followed. Appropriate quality control prac-
analyzed. The laboratory sample must be pulverized, if neces-
tices must be f
...

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