ASTM E507-03

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:E507–03
Standard Test Method for
1
Aluminum in Iron Ores by Atomic Absorption Spectrometry
This standard is issued under the fixed designation E 507; 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 recovery of aluminum, and added to the main solution. The
solution is aspirated into the flame of a nitrous oxide-acetylene
1.1 This test method covers the determination of aluminum
burner. The absorbed energy at the resonance line of the
in iron ores, concentrates, and agglomerates in the concentra-
spectrum of aluminum is measured by atomic absorption
tion range from 0.1 to 5 %.
spectroscopy and compared with that of the calibration solu-
1.2 This standard does not purport to address all of the
tions.
safety problems, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
5.1 This test method is intended as a referee method for
bility of regulatory limitations prior to use.
compliance with compositional specifications for impurity
2. Referenced Documents content. It is assumed that all who use this procedure will be
trained analysts capable of performing common laboratory
2.1 ASTM Standards:
2 practices skillfully and safely. It is expected that work will be
D 1193 Specification for Reagent Water
performed in a properly equipped laboratory and that proper
E 50 Practices for Apparatus, Reagents, and Safety Precau-
3 wastedisposalprocedureswillbefollowed.Followappropriate
tions for Chemical Analysis of Metals
quality control practices such as those described in Guide
E 135 Terminology Relating to Analytical Chemistry for
3 E 882.
Metals, Ores and Related Materials
E 276 Test Method for Particle Size or Screen Analysis at
6. Interferences
No. 4 (4.75-mm) Sieve and Finer for Metal-Bearing Ores
3 6.1 None of the elements normally found in iron ores
and Related Materials
interfere with this test method.
E 882 Guide for Accountability and Quality Control in the
4
Chemical Analysis Laboratory
7. Apparatus
2.2 Other Documents:
7.1 Atomic Absorption Spectrophotometer, meeting the fol-
E 663-86 (1991) Practice for Flame Atomic Absorption
5 lowing criteria:
Analysis
7.1.1 Minimum Sensitivity—The absorbance of the highest
calibration solution (see 8.4) must be at least 0.3.
3. Terminology
7.1.2 Curve-Linearity—The difference between the read-
3.1 Definitions—For definitions of terms used in this test
ings of the two highest calibration solutions must be more than
method, refer to Terminology E 135.
1.4 times the difference between the readings for the zero
4. Summary of Test Method solution and the lowest calibration solution.
7.1.3 Minimum Stability—The coefficient of variation of a
4.1 The sample is dissolved in hydrochloric acid with the
number of measurements of the highest calibration solution
addition of a small amount of nitric acid.After evaporation and
andofthezerocalibrationsolutionmustbelessthan1.5 %and
dehydration, any insoluble residue is filtered, treated for the
0.5 % respectively, relative to the measurement of the highest
calibration solution.
1
This test method is under the jurisdiction of ASTM Committee E01 on
NOTE 1—Use of a strip chart recorder or digital readout device, or both,
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
responsibility of Subcommittee E01.02 on Ores, Concentrates and Related Metal- is advisable.
lurgical Materials.
NOTE 2—Instrument parameters will vary with each instrument. The
Current edition approved June 10, 2003. Published July 2003. Originally
following parameters were successfully used in several laboratories and
approved in 1973. Last previous edition approved in 1988 as E 507 – 73 (1988).
they can be used as guidelines. Solutions were aspirated into a nitrous
2
Annual Book of ASTM Standards, Vol 11.01.
oxide-acetylene flame of a premix burner.
3
Annual Book of ASTM Standards, Vol 03.05.
4
Hollow cathode lamp, mA 25
Annual Book of ASTM Standards, Vol 03.06.
5
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1

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E507–03
sample to the nearest 0.1 mg. Repeat the drying and weighing
Wavelength, l, A 3961.5
Nitrous oxide flow rate, L/min 13.8
until there is no further weight loss. Transfer the sample to a
Acetylene flow rate, L/min 6.6
250-mLbeakerandreweighthecappedbottletothene
...