ASTM E1938-08
(Test Method)Standard Test Method for Determination of Titanium in Nickel Alloys by Diantipyrylmethane Molecular Absorption Spectrometry
Standard Test Method for Determination of Titanium in Nickel Alloys by Diantipyrylmethane Molecular Absorption Spectrometry
SIGNIFICANCE AND USE
This test method is used for the determination of titanium in nickel alloy samples by molecular absorption spectrometry to check compliance with compositional specifications. It is assumed that all who use the procedure will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that the 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 titanium in nickel alloys in the range 0.3 % to 5.0 %. With appropriate reference materials, the test method may be extended down to 0.05 %.
1.2 Molybdenum, if present, may cause a high bias to the extent of 0.001 % titanium for every 1 % molybdenum.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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. For specific hazards associated with the use of this test method, see Practices E 50.
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Designation: E1938 − 08
StandardTest Method for
Determination of Titanium in Nickel Alloys by
1
Diantipyrylmethane Molecular Absorption Spectrometry
This standard is issued under the fixed designation E1938; 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 Method by Inter-Laboratory Tests
ISO 11433:1993(E) Nickel Alloys—Determination of Tita-
1.1 This test method covers the determination of titanium in
nium Content—Diantipyrylmethane Molecular Absorp-
nickel alloys in the range 0.3 % to 5.0 %. With appropriate
tion Spectrometric Method
reference materials, the test method may be extended down to
0.05 %.
3. Terminology
1.2 Molybdenum, if present, may cause a high bias to the
3.1 Definitions—For definitions of terms used in this test
extent of 0.001 % titanium for every 1 % molybdenum.
method, refer to Terminology E135.
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
4. Summary of Test Method
standard.
4.1 This test sample is dissolved in a mixture of HCl and
1.4 This standard does not purport to address all of the
HNO . The solution is evaporated to fumes of H SO to
3 2 4
safety concerns, if any, associated with its use. It is the
remove the HCl and HNO . Color is developed with
3
responsibility of the user of this standard to establish appro-
diantipyrylmethane, and the absorbance is measured at
priate safety and health practices and determine the applica-
390 nm.
bilityofregulatorylimitationspriortouse.Forspecifichazards
associated with the use of this test method, see Practices E50.
5. Significance and Use
2. Referenced Documents 5.1 This test method is used for the determination of
2 titanium in nickel alloy samples by molecular absorption
2.1 ASTM Standards:
spectrometry to check compliance with compositional specifi-
E50 Practices for Apparatus, Reagents, and Safety Consid-
cations. It is assumed that all who use the procedure will be
erations for Chemical Analysis of Metals, Ores, and
trained analysts capable of performing common laboratory
Related Materials
procedures skillfully and safely. It is expected that the work
E135 Terminology Relating to Analytical Chemistry for
will be performed in a properly equipped laboratory and that
Metals, Ores, and Related Materials
properwastedisposalprocedureswillbefollowed.Appropriate
E882 Guide for Accountability and Quality Control in the
quality control practices must be followed such as those
Chemical Analysis Laboratory
described in Guide E882.
E1601 Practice for Conducting an Interlaboratory Study to
Evaluate the Performance of an Analytical Method
6. Apparatus
3
2.2 ISO Standards:
6.1 Spectrophotometer, capable of measuring absorbance at
ISO 5725:1986 Precision of Test Methods—Determination
a wavelength of 390 nm.
of Repeatability and Reproducibility for a Standard Test
6.2 Cells, to fit spectrophotometer, having an optical path of
1
This test method is under the jurisdiction of ASTM Committee E01 on
1 cm.
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
responsibility of Subcommittee E01.08 on Ni and Co and HighTemperatureAlloys.
NOTE 1—Cells having other dimensions can be used, provided suitable
Current edition approved Dec. 15, 2008. Published January 2009. Originally
adjustments can be made in the amount of sample and reagents used.
approved in 1997. Last previous edition approved in 2002 as E1938 – 02. DOI:
10.1520/E1938-08.
7. Reagents
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 Purity and Concentration of Reagents—The purity and
Standards volume information, refer to the standard’s Document Summary page on
concentration of common chemical reagents and water shall
the ASTM website.
3 conform to Practices E50. The reagents should be free of or
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. contain only minimal amounts (< 0.1 µg/g) of titanium.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E1938 − 08
7.2 Potassium Hydrogen Sulfate (KHSO ). 9.1.2 Dissolution of Test Portion—Transfer the test portion
4
toa125-mLErlenmeyerflaskandadd10 mLofHC1and3 mL
7.3 Ascorbic Acid Solution—Dissolve 20 g of ascorbic acid
of HNO . Apply sufficient heat to initiate and maintain the
3
(C H O ) in water, dilute to 200 mL, and mix.
6 8 6
reaction until
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E1938–02 Designation:E1938–08
Standard Test Method for
Determination of Titanium in NickelAlloys by the
Diantipyrylmethane MolecularAbsorption Spectrometric
1
MethodSpectrometry
This standard is issued under the fixed designation E 1938; 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
1.1This test method covers the determination of titanium in nickel alloys in the 0.3 through 5.0% range. With appropriate
reference materials the test method may be extended down to 0.05%.
1.2Molybdenum, if present, may cause a high bias to the extent of 0.001% Ti for every 1% Mo.
1.3
1.1 This test method covers the determination of titanium in nickel alloys in the range 0.3 % to 5.0 %. With appropriate
reference materials, the test method may be extended down to 0.05 %.
1.2 Molybdenum, if present, may cause a high bias to the extent of 0.001 % titanium for every 1 % molybdenum.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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. For specific hazards associated with the use of this test method, see Practices E 50.
2. Referenced Documents
2
2.1 ASTM Standards:
E50 Practices for Apparatus, Reagents, and Safety Precautions for Chemical Analysis of Metals Practices for Apparatus,
Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E882Guide for Accountability and Quality Control in the Chemical Analysis Laboratory 135 Terminology Relating to
Analytical Chemistry for Metals, Ores, and Related Materials
E1452Practice for Preparation of Calibration Solutions for Spectrophotometric and for Spectroscopic Atomic Analysis
882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
E 1601 Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method
2.2 ISO Standards:
ISO 5725:1986 - Precision of Test Methods – Determination of Repeatability and Reproducibility for a Standard Test Method
3
by Inter-Laboratory Tests
ISO 11433:1993(E) - Nickel Alloys - Determination of Titanium Content - Diantipyrylmethane Molecular Absorption
3
Spectrometric Method
ISO 5725:1986 PrecisionofTestMethods—Determination of Repeatability and Reproducibility for a StandardTestMethodby
Inter-Laboratory Tests
ISO 11433:1993(E) NickelAlloys—Determination of Titanium Content—Diantipyrylmethane MolecularAbsorption Spectro-
metric Method
3. Summary of Test Method
3.1This sample is dissolved in a mixture of hydrochloric and nitric acid. The solution is evaporated to sulfuric acid fumes to
remove the hydrochloric and nitric acids. Color is developed with diantipyrylmethane, and the absorbance is measured at 390 nm.
Terminology
1
This test method is under the jurisdiction of ASTM Committee E01 on Analytical Chemistry offor Metals, Ores, and Related Materials, and is the direct responsibility
of Subcommittee E01.08 on Nickel, Cobalt Ni and Co and High Temperature Alloys.
Current edition approved Oct 10, 2002.Dec. 15, 2008. Published June 2003.January 2009. Originally approved in 1997. Last previous edition approved in 19972002 as
E 1938–97.E 1938 – 02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute, 11 West 42nd Street, New York, NY 10036.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E1938–08
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology E 135.
4. Summary of Test Method
4.1 This test sample is dissolved in a mixture of HCl and HNO . The solution is evaporated to fumes
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E1938–02 Designation:E1938–08
Standard Test Method for
Determination of Titanium in NickelAlloys by the
Diantipyrylmethane MolecularAbsorption Spectrometric
1
MethodSpectrometry
This standard is issued under the fixed designation E 1938; 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
1.1This test method covers the determination of titanium in nickel alloys in the 0.3 through 5.0% range. With appropriate
reference materials the test method may be extended down to 0.05%.
1.2Molybdenum, if present, may cause a high bias to the extent of 0.001% Ti for every 1% Mo.
1.3
1.1 This test method covers the determination of titanium in nickel alloys in the range 0.3 % to 5.0 %. With appropriate
reference materials, the test method may be extended down to 0.05 %.
1.2 Molybdenum, if present, may cause a high bias to the extent of 0.001 % titanium for every 1 % molybdenum.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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. For specific hazards associated with the use of this test method, see Practices E 50.
2. Referenced Documents
2
2.1 ASTM Standards:
E50 Practices for Apparatus, Reagents, and Safety Precautions for Chemical Analysis of Metals Practices for Apparatus,
Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E882Guide for Accountability and Quality Control in the Chemical Analysis Laboratory 135 Terminology Relating to
Analytical Chemistry for Metals, Ores, and Related Materials
E1452Practice for Preparation of Calibration Solutions for Spectrophotometric and for Spectroscopic Atomic Analysis
882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
E 1601 Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method
2.2 ISO Standards:
ISO 5725:1986 - Precision of Test Methods – Determination of Repeatability and Reproducibility for a Standard Test Method
3
by Inter-Laboratory Tests
ISO 11433:1993(E) - Nickel Alloys - Determination of Titanium Content - Diantipyrylmethane Molecular Absorption
3
Spectrometric Method
ISO 5725:1986 PrecisionofTestMethods—Determination of Repeatability and Reproducibility for a StandardTestMethodby
Inter-Laboratory Tests
ISO 11433:1993(E) NickelAlloys—Determination of Titanium Content—Diantipyrylmethane MolecularAbsorption Spectro-
metric Method
3. Summary of Test Method
3.1This sample is dissolved in a mixture of hydrochloric and nitric acid. The solution is evaporated to sulfuric acid fumes to
remove the hydrochloric and nitric acids. Color is developed with diantipyrylmethane, and the absorbance is measured at 390 nm.
Terminology
1
This test method is under the jurisdiction of ASTM Committee E01 on Analytical Chemistry offor Metals, Ores, and Related Materials, and is the direct responsibility
of Subcommittee E01.08 on Nickel, Cobalt Ni and Co and High Temperature Alloys.
Current edition approved Oct 10, 2002.Dec. 15, 2008. Published June 2003.January 2009. Originally approved in 1997. Last previous edition approved in 19972002 as
E 1938–97.E 1938 – 02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute, 11 West 42nd Street, New York, NY 10036.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E1938–08
3.1 Definitions—For definitions of terms used in this test method, refer to Terminology E 135.
4. Summary of Test Method
4.1 This test sample is dissolved in a mixture of HCl and HNO . The solution is evaporated to fumes
...
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