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

SIGNIFICANCE AND USE
In the primary metallurgical processes used by the mineral processing industry for copper bearing ores, copper and silver associated with sulfide mineralization are concentrated by the process of flotation for recovery of the metals.
This test method is intended to be a referee method for the determination of silver in copper concentrates. It is assumed that all who use this procedure will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed. Appropriate quality control practices must be followed such as those described in Guide E 882.
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:
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.

General Information

Status
Historical
Publication Date
31-May-2007
Current Stage
Ref Project

Relations

Buy Standard

Standard
ASTM E1898-07 - Standard Test Method for Determination of Silver in Copper Concentrates by Flame Atomic Absorption Spectrometry
English language
5 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E1898 − 07
StandardTest Method for
Determination of Silver in Copper Concentrates by Flame
1
Atomic Absorption Spectrometry
This standard is issued under the fixed designation E1898; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 This test method covers the determination of silver in 2.1 ASTM Standards:
the range of 50 µg/g to 1000 µg/g by acid dissolution of the D1193 Specification for Reagent Water
silver and measurement by atomic absorption spectrophotom- E29 Practice for Using Significant Digits in Test Data to
etry. Copper concentrates are internationally traded within the Determine Conformance with Specifications
following concentration ranges: E50 Practices for Apparatus, Reagents, and Safety Consid-
erations for Chemical Analysis of Metals, Ores, and
Element Unit Concentration Range
Aluminum % 0.05 to 2.50
Related Materials
Antimony % 0.0001 to 4.50
E135 Terminology Relating to Analytical Chemistry for
Arsenic % 0.01 to 0.50
Metals, Ores, and Related Materials
Barium % 0.003 to 0.10
Bismuth % 0.001 to 0.16
E633 Guide for Use of Thermocouples in Creep and Stress-
Cadmium % 0.0005 to 0.04
Rupture Testing to 1800°F (1000°C) in Air
Calcium % 0.05 to 4.00
E882 Guide for Accountability and Quality Control in the
Carbon % 0.10 to 0.90
Chlorine % 0.001 to 0.006
Chemical Analysis Laboratory
Chromium % 0.0001 to 0.10
E1024 Guide for Chemical Analysis of Metals and Metal
Cobalt % 0.0005 to 0.20
Bearing Ores by Flame Atomic Absorption Spectropho-
Copper % 10.0 to 44.0
3
Fluorine % 0.001 to 0.10
tometry (Withdrawn 2004)
Gold µg/g 1.40 to 100.0
E1601 Practice for Conducting an Interlaboratory Study to
Iron % 12.0 to 30.0
Evaluate the Performance of an Analytical Method
Lead % 0.01 to 1.40
Magnesium % 0.02 to 2.00
E1763 Guide for Interpretation and Use of Results from
Manganese % 0.009 to 0.10
Interlaboratory Testing of Chemical Analysis Methods
Mercury µg/g 0.05 to 50.0
Molybdenum % 0.002 to 0.25
3. Terminology
Nickel % 0.0001 to 0.08
Silicon % 0.40 to 20.0
3.1 Definitions—For definitions of terms used in this test
Silver µg/g 18.0 to 8000
method, refer to Terminology E135.
Sulfur % 10.0 to 36.0
Tin % 0.004 to 0.012
Zinc % 0.005 to 4.30
4. Summary of Test Method
1.2 This standard does not purport to address all of the
4.1 The analyst has the option of either digesting the sample
safety concerns, if any, associated with its use. It is the
in nitric and hydrochloric acids or nitric and perchloric acids,
responsibility of the user of this standard to establish appro-
depending on their preference and equipment availability. The
priate safety and health practices and determine the applica-
filtered solutions are aspirated into an air-acetylene flame of an
bility of regulatory limitations prior to its use.
atomic absorption spectrophotometer. Spectral energy at ap-
proximately 328.1 nm from a silver hollow cathode lamp is
1
This test method is under the jurisdiction of ASTM Committee E01 on
2
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct For referenced ASTM standards, visit the ASTM website, www.astm.org, or
responsibility of Subcommittee E01.02 on Ores, Concentrates, and Related Metal- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
lurgical Materials. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2007. Published June 2007. Originally the ASTM website.
3
approved in 1997. Last previous edition approved in 2002 as E1898 - 02. DOI: The last approved version of this historical standard is referenced on
10.1520/E1898-07. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E1898 − 07
passed through the flame and the absorbance is measured.This 8.4 Silver Standard Solution B(1mL=10µgAg)—Pipet10
absorbance is compared with the absorbance of a series of mL of Silver Standard Solution A into a 1-L volumetric flask
standard calibration solutions. containing about 500 mL of water and 250 mL of HCl. Mix,
cool, dilute to the mark, and remix. If turbid, discard the
5. Significance and Use
solution and repeat the preparation. Transfer to a dark bottle.
Prepare immediately before use.
5.1 In the primary metallurgical processes used by the
mineral processing industry for copper bearing ores, copper
9. Hazards
and silver associated with sulfide mineralization are concen-
trated by the process of flotation for recovery of the m
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.