ASTM D1426-03
(Test Method)Standard Test Methods for Ammonia Nitrogen In Water
Standard Test Methods for Ammonia Nitrogen In Water
SIGNIFICANCE AND USE
Nitrogen is a nutrient in the environment and is necessary to sustain growth of most organisms. It exists in several forms such as nitrate, nitrite, organic nitrogen such as proteins or amino acids, and ammonia.
Ammonia is a colorless, gaseous compound with a sharp distinctive odor. It is highly soluble in water where it exists in a molecular form associated with water and in an ionized form as NH4 +. The extent of association or ionization is dependent on the temperature and pH. It may also be toxic to aquatic life. The extent of toxicity is dependent upon species and extent of dissociation.7 Ammonia may occur in water as a product of anaerobic decomposition of nitrogen containing compounds or from waste streams containing ammonia.
SCOPE
1.1 These test methods cover the determination of ammonia nitrogen, exclusive of organic nitrogen, in water. Two test methods are included as follows: SectionsTest Method A—Direct Nesslerization7 to 15Test Method B—Ion Selective Electrode16 to 24
1.2 Test Method A is used for the routine determination of ammonia in steam condensates and demineralizer effluents.
1.3 Test Method B is applicable to the determination of ammonia nitrogen in the range from 0.5 to 1000 mg NH3N/L directly in reagent and effluent waters. Higher concentrations can be determined following dilution. The reported lower range is based on multiple-operator precision. Lower limits have been obtained by two of the twelve laboratories participating in the round robin.
1.4 Both test methods A and B are applicable to surface and industrial waters and wastewaters following distillation. The test method for distillation given in has been used in the past to meet requirements for predistillation of samples being analyzed for ammonia.
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.
1.6 The distillation method now appears as Appendix X1 and is provided as nonmandatory information only. The automated colorimetric phenate method has been discontinued.
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Standards Content (Sample)
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Designation:D 1426–03
Standard Test Methods for
1
Ammonia Nitrogen In Water
This standard is issued under the fixed designation D 1426; 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.
1. Scope* D 1192 Guide for Equipment for Sampling Water and
2
Steam in Closed Conduits
1.1 These test methods cover the determination of ammonia
2
D 1193 Specification for Reagent Water
nitrogen, exclusive of organic nitrogen, in water. Two test
D 2777 Practice for Determination of Precision and Bias of
methods are included as follows:
2
Applicable Methods of Committee D19 on Water
Sections
2
D 3370 Practices for Sampling Water
Test Method A—Direct Nesslerization 7 to 15
2
Test Method B—Ion Selective Electrode 16 to 24
D 5810 Guide for Spiking into Aqueous Samples
D 5847 Practice for Writing Quality Control Specifications
1.2 Test Method A is used for the routine determination of
3
for Standard Test Methods for Water Analysis
ammonia in steam condensates and demineralizer effluents.
E60 Practice for Analysis of Metals, Ores, and Related
1.3 Test Method B is applicable to the determination of
4
Materials by Molecular Absorption Spectrometry
ammonia nitrogen in the range from 0.5 to 1000 mg NH N/L
3
E 275 Practice for Describing and Measuring Performance
directly in reagent and effluent waters. Higher concentrations
of Ultraviolet, Visible, and Near Infrared Spectrophotom-
can be determined following dilution. The reported lower
5
eters
range is based on multiple-operator precision. Lower limits
2.2 APHA Standard:
have been obtained by two of the twelve laboratories partici-
Standard Methods for the Examination of Water and Waste
pating in the round robin.
6
Water
1.4 Both test methodsAand B are applicable to surface and
industrial waters and wastewaters following distillation. The
3. Terminology
testmethodfordistillationgiveninAppendixX1hasbeenused
3.1 Definitions—For definitions of terms used in these test
in the past to meet requirements for predistillation of samples
methods, refer to Terminology D 1129.
being analyzed for ammonia.
1.5 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 Nitrogen is a nutrient in the environment and is neces-
responsibility of the user of this standard to establish appro-
sary to sustain growth of most organisms. It exists in several
priate safety and health practices and determine the applica-
forms such as nitrate, nitrite, organic nitrogen such as proteins
bility of regulatory limitations prior to use.
or amino acids, and ammonia.
1.6 The distillation method now appears as Appendix X1
4.2 Ammoniaisacolorless,gaseouscompoundwithasharp
and is provided as nonmandatory information only. The auto-
distinctive odor. It is highly soluble in water where it exists in
mated colorimetric phenate method has been discontinued.
a molecular form associated with water and in an ionized form
+
2. Referenced Documents as NH . The extent of association or ionization is dependent
4
on the temperature and pH. It may also be toxic to aquatic life.
2.1 ASTM Standards:
2
The extent of toxicity is dependent upon species and extent of
D 1066 Practice for Sampling Steam
7
2
dissociation. Ammonia may occur in water as a product of
D 1129 Terminology Relating to Water
1 3
These test methods are under the jurisdiction of ASTM Committee D19 on Annual Book of ASTM Standards, Vol 11.02.
4
Water and are the direct responsibility of Subcommittee D19.05 on Inorganic Annual Book of ASTM Standards, Vol 03.05.
5
Constituents in Water. Annual Book of ASTM Standards, Vol 03.06.
6
Current edition approved June 10, 2003. Published July 2003. Originally Available from American Public Health Association,800 I St. N.W., Washing-
approved in 1956. Last previous edition approved in 1998 as D 1426 – 98. ton, DC 20001.
2 7
Annual Book of ASTM Standards, Vol 11.01. Quality Criteria for Water, USEPA-440/9-76-023, July 26, 1976, pp. 16–24.
*A Summary of Changes section appears at the end of this standard.
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D 1426–03
anaerobic decomposition of nitrogen containing compounds or aldehydes, alcohols, and some amines may cause an off color
from waste streams containing ammonia. on Nesslerization. Some of these, such as formaldehyde may
beeliminatedbyboilingoffatalowpHpriortoNesslerization.
5. Purity of
...
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