ASTM D3082-92(1996)
(Test Method)Standard Test Method for Boron In Water
Standard Test Method for Boron In Water
SCOPE
1.1 This test method covers the determination of boron in water and wastewaters by the curcumin colorimetric-extraction method in concentrations between 0.1 and 1.0 mg/L. The range can be extended by dilution of the sample.
1.2 Only dissolved boron is determined. This test method requires that the water sample be filtered through a 0.45-[mu]m membrane filter before analysis.
1.3 This test method is a colorimetric method that is very sensitive to low concentrations of boron in water and requires a relatively small sample volume for analysis.
1.4 Precision and bias were obtained on natural and wastewaters. It is the user's responsibility to ensure the validity of this test method for waters of untested matrices.
1.5 This standard does not purpose to address all of the safety problems, 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.
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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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 3082 – 92 (Reapproved 1996)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
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Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
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Boron In Water
This standard is issued under the fixed designation D 3082; 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.
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1. Scope Methods for Chemical Analysis of Metals
E 200 Practice for Preparation, Standardization, and Stor-
1.1 This test method covers the determination of boron in
age of Standard and Reagent Solutions for Chemical
water and wastewaters by the curcumin colorimetric-extraction
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2 Analysis
method in concentrations between 0.1 and 1.0 mg/L. The
E 275 Practice for Describing and Measuring Performance
range can be extended by dilution of the sample.
of Ultraviolet, Visible, and Near Infrared Spectrophotom-
1.2 Only dissolved boron is determined. This test method
6
eters
requires that the water sample be filtered through a 0.45-μm
membrane filter before analysis.
3. Terminology
1.3 This test method is a colorimetric method that is very
3.1 Definitions: For definitions of terms used in this test
sensitive to low concentrations of boron in water and requires
method, refer to Terminology D 1129.
a relatively small sample volume for analysis.
1.4 Precision and bias were obtained on natural and waste- 4. Summary of Test Method
waters. It is the user’s responsibility to ensure the validity of
4.1 When a water sample containing soluble boron is
this test method for waters of untested matrices.
acidified with hydrochloric acid and evaporated to dryness in
1.5 This standard does not purport to address all of the
the presence of circumin, a red-colored complex called roso-
safety concerns, if any, associated with its use. It is the
cyanine is formed. This colored product is taken up in
responsibility of the user of this standard to establish appro-
isopropyl alcohol and is read spectrophotometrically.
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use.
5.1 Because boron can be both essential and deleterious to
2. Referenced Documents
plant growth, and because ingestion of large amounts can affect
the central nervous system in humans, a method is required to
2.1 ASTM Standards:
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determine its concentration in potable, natural, and wastewa-
D 1066 Practice for Sampling Steam
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ters. This test method provides a means of determining the
D 1129 Terminology Relating to Water
boron concentration of these waters. The holding time for the
D 1192 Specification for Equipment for Sampling Water
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samples may be calculated in accordance with Practice D 4841.
and Steam in Closed Conduits
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5.2 Boric acid is used for chemical shim control of neutron
D 1193 Specification for Reagent Water
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flux in a nuclear reactor. This test method serves to determine
D 1293 Test Methods for pH of Water
if the boron concentration is within acceptable limits.
D 2777 Practice for Determination of Precision and Bias of
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Applicable Test Methods of Committee D-19 on Water
6. Interferences
D 3370 Practices for Sampling Water from Closed Con-
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6.1 Nitrate concentrations above 20 mg/L begin to interfere.
duits
Hardness levels about 100 mg/L as CaCO give high results
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D 4841 Practice for Estimation of Holding Time for
because of the turbidity caused by the insolubility of the
Water Samples Containing Organic and Inorganic Con-
3 hardness salts in isopropyl alcohol. The turbidity can be
stituents
eliminated by filtering the final solution through a 0.45-μm
E 60 Practice for Photometric and Spectrophotometric
membrane filter before reading on the spectrophotometer.
6.2 Organic color may be present in the sample that could
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This test method is under the jurisdiction of ASTM Committee D-19 on Water affect absorbance readings on the spectrophotometer. If an
and is the direct responsibility of Subcommittee D19.05 on Inorganic Constituents
interfering organic color is present in the sample, the following
in Water.
procedure has been found useful in reducing this interference
Current edition approved May 15, 1992. Published September 1992. Originally
published as D 3082 – 72 T. Last previous edition D 3082 – 87.
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This test method is similar to, but not identical with that appearing in Standard
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Methods for Examination of Water and Wastewater, 13th Ed., American Public Annual Book of ASTM Standards, Vol 03.05.
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Health Association, Washington, DC, pp 69–72. Annual Book of ASTM Standards, Vol 15.05.
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Annual Book of ASTM Standards, Vol
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