ASTM D3372-12
(Test Method)Standard Test Method for Molybdenum in Water
Standard Test Method for Molybdenum in Water
SIGNIFICANCE AND USE
5.1 Molybdenum can be found in waste that results from chemical cleaning of components in which the metal is alloyed.
5.2 National Pollution Discharge Elimination System (NPDES) permits or other standards, or both, require monitoring pollutants in waste discharged onto the water shed of, or into, navigable waters, and those disposed of in such a manner that eventual contamination of underground water could result.
5.3 This test method affords an accurate and sensitive means of determining compliance with those permits.
SCOPE
1.1 This test method covers the determination of dissolved and total recoverable molybdenum in most waters, wastewaters, and brines by atomic absorption spectroscopy.2
1.2 This test method is applicable in the range from 1 to 25 μg/L of molybdenum. The range may be extended by dilution of the sample.
1.3 This test method has been used successfully with natural and reagent waters. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are mathematical conversions and may not be exact equivalents; therefore, each system shall be used independently of the other.
1.5 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 precautionary statements, see Note 3 and Note 11.
General Information
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D3372 − 12
Standard Test Method for
1
Molybdenum in Water
This standard is issued under the fixed designation D3372; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* D4691 Practice for Measuring Elements in Water by Flame
Atomic Absorption Spectrophotometry
1.1 This test method covers the determination of dissolved
D4841 Practice for Estimation of Holding Time for Water
and total recoverable molybdenum in most waters,
2 Samples Containing Organic and Inorganic Constituents
wastewaters, and brines by atomic absorption spectroscopy.
D5810 Guide for Spiking into Aqueous Samples
1.2 This test method is applicable in the range from 1 to 25
D5847 Practice for Writing Quality Control Specifications
µg/L of molybdenum. The range may be extended by dilution
for Standard Test Methods for Water Analysis
of the sample.
1.3 Thistestmethodhasbeenusedsuccessfullywithnatural 3. Terminology
and reagent waters. It is the user’s responsibility to ensure the
3.1 Definitions: For definitions of terms used in this test
validity of this test method for waters of untested matrices.
method, refer to Terminology D1129.
1.4 The values stated in either SI units or inch-pound units
3.2 Definitions of Terms Specific to This Standard:
are to be regarded separately as standard. The values stated in
3.2.1 laboratory control sample—a solution with the certi-
each system are mathematical conversions and may not be
fied concentration(s) of the analytes.
exact equivalents; therefore, each system shall be used inde-
3.2.2 totalrecoverablemolybdenum—anarbitraryanalytical
pendently of the other.
term relating to the forms of molybdenum that are determin-
1.5 This standard does not purport to address all of the
able by the digestion procedure described in this test method.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 Molybdenum is determined by atomic-absorption spec-
bility of regulatory limitations prior to use. For specific
trophotometry. The element is chelated with
precautionary statements, see Note 3 and Note 11.
8-hydroxyquinoline, extracted with methyl isobutyl ketone,
and the extract aspirated into the nitrous oxide-acetylene flame
2. Referenced Documents
3 of the spectrophotometer.
2.1 ASTM Standards:
D1129 Terminology Relating to Water
5. Significance and Use
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of
5.1 Molybdenum can be found in waste that results from
Applicable Test Methods of Committee D19 on Water chemicalcleaningofcomponentsinwhichthemetalisalloyed.
D3370 Practices for Sampling Water from Closed Conduits
5.2 National Pollution Discharge Elimination System
(NPDES) permits or other standards, or both, require monitor-
ing pollutants in waste discharged onto the water shed of, or
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
into, navigable waters, and those disposed of in such a manner
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
in Water.
that eventual contamination of underground water could result.
Current edition approved Sept. 1, 2012. Published October 2012. Originally
ε1
5.3 Thistestmethodaffordsanaccurateandsensitivemeans
approved in 1975. Last previous edition approved in 2002 as D3372 – 02 (2007) .
DOI: 10.1520/D3372-12.
of determining compliance with those permits.
2
Chau, Y. K., and Lum-Shue-Chan, K., “Atomic Absorption Determination of
Microgram Quantities of Molybdenum in Lake Waters,” Analytica Chimica Acta,
6. Interferences
Vol 48, 1969, p. 205.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1 Vanadium (V) and iron (III) enhance the absorption,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
while chromium (VI) and tungsten (VI) suppress it. These
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. interferences are eliminated by the addition of ascorbic acid.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3372 − 12
7. Apparatus 8.9 Molybdenum Solution, Intermediate (1.0 mL = 1.0 µg
Mo)—Dilute 10.0 mL of molybdenum stock solution to
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
´1
Designation: D3372 − 02 (Reapproved 2007) D3372 − 12
Standard Test Method for
1
Molybdenum in Water
This standard is issued under the fixed designation D3372; 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.
This standard has been approved for use by agencies of the Department of Defense.
1
εNOTE—Sections 5.2 and 13.5 were updated editorially in September 2007.
1. Scope Scope*
1.1 This test method covers the determination of dissolved and total recoverable molybdenum in most waters, wastewaters, and
2
brines by atomic absorption spectroscopy.
1.2 This test method is applicable in the range from 1 to 25 μg/L of molybdenum. The range may be extended by dilution of
the sample.
1.3 This test method has been used successfully with natural and reagent waters. It is the user’s responsibility to ensure the
validity of this test method for waters of untested matrices.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are mathematical conversions and may not be exact equivalents; therefore, each system shall be used independently of the
other.
1.5 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 precautionary statements, see Note 3 and Note 911.
2. Referenced Documents
3
2.1 ASTM Standards:
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
D3370 Practices for Sampling Water from Closed Conduits
D4691 Practice for Measuring Elements in Water by Flame Atomic Absorption Spectrophotometry
D4841 Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
3. Terminology
3.1 Definitions: For definitions of terms used in this test method, refer to Terminology D1129.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 laboratory control sample—a solution with the certified concentration(s) of the analytes.
3.2.2 total recoverable molybdenum—an arbitrary analytical term relating to the forms of molybdenum that are determinable
by the digestion procedure described in this test method.
1
This test method is under the jurisdiction of ASTM Committee D19 on Water and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents in Water.
Current edition approved Aug. 1, 2007Sept. 1, 2012. Published September 2007 October 2012. Originally approved in 1975. Last previous edition approved in 2002 as
D3372 – 02.D3372 – 02(2007)E01. DOI: 10.1520/D3372-02R07E01.10.1520/D3372-12.
2
Chau, Y. K., and Lum-Shue-Chan, K., “Atomic Absorption Determination of Microgram Quantities of Molybdenum in Lake Waters,” Analytica Chimica Acta, Vol 48,
1969, p. 205.
3
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3372 − 12
4. Summary of Test Method
4.1 Molybdenum is determined by atomic-absorption spectrophotometry. The element is chelated with 8-hydroxyquinoline,
extracted with methyl isobutyl ketone, and the extract aspirated into the nitrous oxide-acetylene flame of the spectrophotometer.
5. Significance and Use
5.1 Molybdenum can be found in waste that results from chemical cleaning of components in which the metal is alloyed.
5.2 National Pollution Discharge Elimination System (NPDES) permits or other standards, or both, require monitoring
pollutants in waste discharged onto the water shed of, or into, navigable waters, and those disposed of in such a manner that
eventual contam
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.