ASTM D1068-15

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
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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:
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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
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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
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D1068 − 15
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