ASTM D1068-15
(Test Method)Standard Test Methods for Iron in Water
Standard Test Methods for Iron in Water
SIGNIFICANCE AND USE
4.1 Iron is the second most abundant metallic element in the earth's crust and is essential in the metabolism of plants and animals. If presented in excessive amounts, however, it forms oxyhydroxide precipitates that stain laundry and porcelain. As a result, the recommended limit for iron in domestic water supplies is 0.3 mg/L. These test methods are useful for determining iron in many natural waters.
SCOPE
1.1 These test methods cover the determination of iron in water. Procedures are given for determining total iron, dissolved iron, and ferrous iron. Undissolved iron may be calculated from the total iron and dissolved iron determinations. The test methods are given as follows:
Range
Sections
Test Method A—Atomic Absorption,
Direct
0.1 to 5.0 mg/L
7 to 16
Test Method B—Atomic Absorption,
Graphite Furnace
5 to 100 μg/L
17 to 26
Test Method C—Photometric
Bathophenanthroline μg/L
40 to 1000 μg/L
27 to 38
1.2 It is the user's responsibility to ensure the validity of these test methods to waters of untested matrices.
1.3 The chelation-extraction and two former photometric test methods were discontinued. See Appendix X2 for historical information.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
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. Specific hazards statements are given in Note 4, 11.7.1, and X1.1.2.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D1068 − 15
Standard Test Methods for
1
Iron in Water
This standard is issued under the fixed designation D1068; 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* D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
1.1 These test methods cover the determination of iron in
D1687 Test Methods for Chromium in Water
water. Procedures are given for determining total iron, dis-
D1688 Test Methods for Copper in Water
solved iron, and ferrous iron. Undissolved iron may be
D1691 Test Methods for Zinc in Water
calculated from the total iron and dissolved iron determina-
D1886 Test Methods for Nickel in Water
tions. The test methods are given as follows:
D2777 Practice for Determination of Precision and Bias of
Range Sections
Applicable Test Methods of Committee D19 on Water
Test Method A—Atomic Absorption, 0.1 to 5.0 mg/L 7 to 16
Direct D3370 Practices for Sampling Water from Closed Conduits
Test Method B—Atomic Absorption, 5 to 100 µg/L 17 to 26
D3558 Test Methods for Cobalt in Water
Graphite Furnace
D3559 Test Methods for Lead in Water
Test Method C—Photometric 40 to 1000 µg/L 27 to 38
Bathophenanthroline µg/L D3919 Practice for Measuring Trace Elements in Water by
Graphite Furnace Atomic Absorption Spectrophotometry
1.2 It is the user’s responsibility to ensure the validity of
D4841 Practice for Estimation of Holding Time for Water
these test methods to waters of untested matrices.
Samples Containing Organic and Inorganic Constituents
1.3 The chelation-extraction and two former photometric
D5673 Test Method for Elements in Water by Inductively
test methods were discontinued. See Appendix X2 for histori-
Coupled Plasma—Mass Spectrometry
cal information.
D5810 Guide for Spiking into Aqueous Samples
1.4 The values stated in SI units are to be regarded as
D5847 Practice for Writing Quality Control Specifications
standard. The values given in parentheses are mathematical
for Standard Test Methods for Water Analysis
conversions to inch-pound units that are provided for informa-
E60 Practice for Analysis of Metals, Ores, and Related
tion only and are not considered standard.
Materials by Spectrophotometry
E275 Practice for Describing and Measuring Performance of
1.5 This standard does not purport to address all of the
Ultraviolet and Visible Spectrophotometers
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3. Terminology
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. Specific hazards
3.1 Definitions:
statements are given in Note 4, 11.7.1, and X1.1.2.
3.1.1 For definitions of terms used in this standard, refer to
Terminology D1129.
2. Referenced Documents
3.2 Definitions of Terms Specific to This Standard:
2
2.1 ASTM Standards:
3.2.1 total recoverable iron, n—a descriptive term relating
D858 Test Methods for Manganese in Water
to the iron forms recovered in the acid-digestion procedure
D1066 Practice for Sampling Steam
specified in these test methods.
4. Significance and Use
1
These test methods are under the jurisdiction of ASTM Committee D19 on
Water and are the direct responsibility of Subcommittee D19.05 on Inorganic
4.1 Iron is the second most abundant metallic element in the
Constituents in Water.
earth’s crust and is essential in the metabolism of plants and
Current edition approved Oct. 1, 2015. Published October 2015. Originally
animals. If presented in excessive amounts, however, it forms
approved in 1949. Last previous edition approved in 2010 as D1068 – 10. DOI:
10.1520/D1068-15.
oxyhydroxide precipitates that stain laundry and porcelain. As
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
a result, the recommended limit for iron in domestic water
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
supplies is 0.3 mg/L. These test methods are useful for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. determining iron in many natural waters.
*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 ----------------------
D1068 − 15
5. Purit
...
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.
Designation: D1068 − 10 D1068 − 15
Standard Test Methods for
1
Iron in Water
This standard is issued under the fixed designation D1068; 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*
1.1 These test methods cover the determination of iron in water. Procedures are given for determining total iron, dissolved iron,
and ferrous iron. Undissolved iron may be calculated from the total iron and dissolved iron determinations. The test methods are
given as follows:
Range Sections
Test Method A—Atomic Absorption, 0.1 to 5.0 mg/L 7 to 16
Direct
Test Method B—Atomic Absorption, 5 to 100 μg/L 17 to 26
Graphite Furnace
Test Method C—Photometric 40 to 1000 μg/L 27 to 38
Bathophenanthroline μg/L
Range Sections
Test Method A—Atomic Absorption, 0.1 to 5.0 mg/L 7 to 16
Direct
Test Method B—Atomic 5 to 100 μg/L 17 to 26
Absorption, Graphite Furnace
Test Method C—Photometric 40 to 1000 μg/L 27 to 38
Bathophenanthrolineμ g/L
1.2 It is the user’s responsibility to ensure the validity of these test methods to waters of untested matrices.
1.3 The chelation-extraction and two former photometric test methods were discontinued. See Appendix X2 for historical
information.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this The values
given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not
considered standard.
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. Specific hazards statements are given in Note 34, 11.7.1, and X1.1.2.
2. Referenced Documents
2
2.1 ASTM Standards:
D858 Test Methods for Manganese in Water
D1066 Practice for Sampling Steam
D1129 Terminology Relating to Water
D1193 Specification for Reagent Water
D1687 Test Methods for Chromium in Water
D1688 Test Methods for Copper in Water
D1691 Test Methods for Zinc in Water
D1886 Test Methods for Nickel in Water
D2777 Practice for Determination of Precision and Bias of Applicable Test Methods of Committee D19 on Water
1
These test methods are under the jurisdiction of ASTM Committee D19 on Water and are the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
in Water.
Current edition approved Sept. 1, 2010Oct. 1, 2015. Published October 2010October 2015. Originally approved in 1949. Last previous edition approved in 20052010 as
ε1
D1068 – 05D1068 – 10. . DOI: 10.1520/D1068-10.10.1520/D1068-15.
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 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 ----------------------
D1068 − 15
D3370 Practices for Sampling Water from Closed Conduits
D3558 Test Methods for Cobalt in Water
D3559 Test Methods for Lead in Water
D3919 Practice for Measuring Trace Elements in Water by Graphite Furnace Atomic Absorption Spectrophotometry
D4841 Practice for Estimation of Holding Time for Water Samples Containing Organic and Inorganic Constituents
D5673 Test Method for Elements in Water by Inductively Coupled Plasma—Mass Spectrometry
D5810 Guide for Spiking into Aqueous Samples
D5847 Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
E60 Practice for Analysis of Metals, Ores, and Related Materials by Spectrophotometry
E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers
3. Terminology
3.1 Definitions—For definitions of terms used in these test methods, refer to Terminology D1129.
3.1 Definitions:
3.1.1 For definitions of terms used in this standard, refer to Terminology D1129.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 total recoverable iron, n
...
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