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ASTM D1068-96

(Test Method)

Standard Test Methods for Iron in Water

Standard Test Methods for Iron in Water

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 15 Direct Test Method C-Atomic Absorption, 5 to 100

General Information

Status
Historical
Publication Date
31-Dec-1995
ICS
13.060.50 - Examination of water for chemical substances
Technical Committee
D19 - Water
Drafting Committee
D19.05 - Inorganic Constituents in Water
Current Stage
Ref Project

Relations

Replaced By
ASTM D1068-03 - Standard Test Methods for Iron in Water
Effective Date
10-Jan-2003

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ASTM D1068-96 - Standard Test Methods for Iron in Water
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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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 1068 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Methods for
1
Iron in Water
This standard is issued under the fixed designation D 1068; 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.
This standard has been approved for use by agencies of the Department of Defense. Consult the DoD Index of Specifications and
Standards for the specific year of issue which has been adopted by the Department of Defense.
1. Scope D 2777 Practice for Determination of Precision and Bias of
2
Applicable Methods of Committee D-19 on Water
1.1 These test methods cover the determination of iron in
D 3370 Practices for Sampling Water from Closed Con-
water. Procedures are given for determining total iron, dis-
2
duits
solved iron, and ferrous iron. Undissolved iron may be
2
D 3558 Test Methods for Cobalt in Water
calculated from the total iron and dissolved iron determina-
2
D 3559 Test Methods for Lead in Water
tions. The test methods are given as follows:
D 3919 Practice for Measuring Trace Elements in Water by
Range Sections
2
Graphite Furnace Atomic Absorption Spectrophotometry
Test Method A—Atomic Absorption, 0.1 to 5.0 mg/L 7 to 15
Direct
D 4841 Practice for Estimation of Holding Time for Water
Test Method C—Atomic Absorption, 5 to 100 μg/L 16 to 24
2
Samples Containing Organic and Inorganic Constituents
Graphite Furnace
E 60 Practice for Photometric and Spectrophotometric
Test Method D—Photometric 40 to 1000 μg/L 25 to 36
3
Bathophenanthrolineμ g/L
Methods for Chemical Analysis of Metals
E 275 Practice for Describing and Measuring Performance
1.2 It is the user’s responsibility to ensure the validity of
of Ultraviolet, Visible, and Near Infrared Spectrophotom-
these test methods to waters of untested matrices.
4
eters
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions: —For definitions of terms used in these test
priate safety and health practices and determine the applica-
methods, refer to Terminology D 1129.
bility of regulatory limitations prior to use. Specific hazards
3.2 Definitions of Terms Specific to This Standard:
statements are given in Note 3, Note 5, and Note X1.1.
3.2.1 total recoverable iron—an arbitrary analytical term
1.4 Two former photometric test methods were discontin-
relating to the recoverable forms of iron that are determinable
ued. See Appendix X2 for historical information.
by the digestion method which is included in these test
methods.
2. Referenced Documents
2.1 ASTM Standards:
4. Significance and Use
2
D 858 Test Methods for Manganese in Water
2 4.1 Iron is the second most abundant metallic element in the
D 1066 Practice for Sampling Steam
2 earth’s crust and is essential in the metabolism of plants and
D 1129 Terminology Relating to Water
animals. If presented in excessive amounts, however, it forms
D 1192 Specification for Equipment for Sampling Water
2 oxyhydroxide precipitates that stain laundry and porcelain. As
and Steam in Closed Conduits
a result, the recommended limit for iron in domestic water
2
D 1193 Specification for Reagent Water
2 supplies is 0.3 mg/L. These test methods are useful for
D 1687 Test Methods for Chromium in Water
determining iron in many natural waters.
2
D 1688 Test Methods for Copper in Water
2
D 1691 Test Methods for Zinc in Water
5. Purity of Reagents
2
D 1886 Test Methods for Nickel in Water
5.1 Reagent grade chemicals shall be used in all tests.
1
Unless otherwise indicated, it is intended that all reagents shall
These test methods are under the jurisdiction of ASTM Committee D-19 on
Water and are the direct responsibility of Subcommittee D19.05 on Inorganic
3
Constituents in Water.
Annual Book of ASTM Standards, Vol 03.05.
4
Current edition approved Feb. 10, 1996. Published May 1996. Originally
Annual Book of ASTM Standards, Vol 03.06.
published as D 1068 – 49 T. Last previous edition D 1068 – 90.
2
Annual Book of ASTM Standards, Vol 11.01.
1

---------------------- Page: 1 ----------------------
NOTICE:¬This¬standard¬has¬either¬been¬superseded¬and¬replaced¬by¬a¬new¬version¬or
discontinued.¬Contact¬ASTM¬International¬(www.astm.org)¬for¬the¬latest¬information.¬
D 1068
conform to the specifications of the Committee on Analytical dure may be used to determine total recoverable nickel (Test
Reagents of the American Chemical Society, where such Methods D 1886)
...

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1.4 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.5 The Reporting Range for the target analytes are listed in Table 1.  
1.5.1 The reporting limit in this test method is the minimum value below which data are documented as non-detects. The reporting limit is calculated from the concentration of the Level 1 calibration standard as shown in Table 6 after taking into account an 8 mL water sample volume and a final diluted sample volume of 10 mL (80 % water/20 % methanol).  
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1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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