ASTM E1024-97(2004)
(Guide)Standard Guide for Chemical Analysis of Metals and Metal Bearing Ores by Flame Atomic Absorption Spectrophotometry (Withdrawn 2004)
Standard Guide for Chemical Analysis of Metals and Metal Bearing Ores by Flame Atomic Absorption Spectrophotometry (Withdrawn 2004)
SCOPE
1.1 This guide covers general recommendations for the use of atomic absorption spectrophotometers in the flame mode for the chemical analysis of metals and metal bearing ores by ASTM methods. It describes tests to determine whether the instrument's performance is satisfactory and recommends procedures for taking atomic absorption measurements. Additional information may be found in Practice E663.
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 use.
WITHDRAWN RATIONALE
This guide covers general recommendations for the use of atomic absorption spectrophotometers in the flame mode for the chemical analysis of metals and metal bearing ores by ASTM methods.
Formerly under the jurisdiction of Committee E01 on Analytical Chemistry for Metals, Ores, and Related Materials, this guide was withdrawn in October 2004 because it is no longer in practice.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:E1024 – 97 (Reapproved 2004)
Standard Guide for
Chemical Analysis of Metals and Metal Bearing Ores by
1
Flame Atomic Absorption Spectrophotometry
This standard is issued under the fixed designation E 1024; 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 measurements, and correct interpretation of the instrument’s
response. An ASTM method that refers to this guide specifies
1.1 This guide covers general recommendations for the use
the procedures for preparation of test and calibration solutions.
of atomic absorption spectrophotometers in the flame mode for
This guide gives the instrument-related procedures for using
the chemical analysis of metals and metal bearing ores by
the atomic absorption spectrophotometer in the flame mode
ASTM methods.
and calculating the results.
1.2 This standard does not purport to address all of the
3.2 Because atomic absorption spectrophotometers vary
safety concerns, if any, associated with its use. It is the
greatly in their sensitivity for any specific element, the con-
responsibility of the user of this standard to establish appro-
centration ranges for test and calibration solutions given in
priate safety and health practices and determine the applica-
each method must be considered only a guide for analysts who
bility of regulatory limitations prior to use.
are not familiar with the response of their instruments for the
2. Referenced Documents element to be determined. Those who know the optimum
2
concentration range of their instrument should prepare calibra-
2.1 ASTM Standards:
tion solutions based upon that knowledge.
E 50 Practices forApparatus, Reagents, and Safety Consid-
3.3 Thisguideisbaseduponsimplegraphicalormathemati-
erations for Chemical Analysis of Metals, Ores, and
cal ratio interpolations of instrument response between calibra-
Related Materials
tion points. For this reason, the criterion for “curve linearity” is
E 863 Practice for Describing Flame Atomic Absorption
conservative in order to minimize the error introduced by a
Spectroscopy Equipment
linear approximation to, or manual graphing of, a markedly
E 1452 Practice for Preparation of Calibration Solutions for
curvilinear response. Other methods of relating concentration
Spectrophotometric and for Spectroscopic Atomic Analy-
to instrument response (such as, microprocessor curve-fitting
sis
techniques) may be valid for concentrations higher than the
E 1812 Practice for Optimization of FlameAtomicAbsorp-
limit posed by the “curve linearity” test in this guide. None of
tion Spectrometric Equipment
these methods have been universally adopted and each method
3. Significance and Use
that has been proposed achieves its highest precision only in
dealing with certain cases. The methods given in this guide are
3.1 The precision and accuracy of atomic absorption analy-
universally applicable. If employed carefully, they will provide
ses are influenced by many factors. Most important of these
satisfactory precision and accuracy.
factors are the proper preparation of the test solutions, the
proper selection and preparation of calibration solutions, and
4. Interferences
instrument-related factors, such as proper setting of instrument
4.1 Chemical and spectral interferences from sample matrix
parameters, the proper sequence of calibration and test solution
elements and solvent medium anions are common. The stan-
dard method that references this guide will have provided the
1
This guide is under the jurisdiction of ASTM Committee E01 on Analytical
appropriate remedy: prechemical isolation of the analyte spe-
Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
cies, the addition of matrix-modifying reagents, or the speci-
Subcommittee E01.20 on Fundamental Practices.
fication of special calibration procedures.
Current edition approved July 1, 2004. Published August 2004. Originally
approved in 1984. Last previous edition approved in 1997 as E 1024 – 97. 4.2 Ionization of the analyte element in the flame is a
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
frequent problem since only ground-state atoms are measured.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
If this effect is significant, the standard method that references
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E1024 – 97 (2004)
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