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Standard Test Methods for Ammonia Nitrogen In Water
:
Available format(s): Hardcopy, PDF
Superseded date: 06-01-2022
Language(s): English
Published date: 24-04-2015
Publisher: American Society for Testing and Materials
These test methods cover the determination of ammonia nitrogen, exclusive of organic nitrogen, in water. Two test methods are included as follows:Sections Test Method A—Direct Nesslerization 7 – 16 Test Method B—Ion Selective Electrode 17 – 24 Test Method A is used for the routine determination of ammonia in steam condensates and demineralizer effluents.
1.1These test methods cover the determination of ammonia nitrogen, exclusive of organic nitrogen, in water. Two test methods are included as follows:
Sections
Test Method A—Direct Nesslerization
7 – 16
Test Method B—Ion Selective Electrode
17 – 24
1.2Test Method A is used for the routine determination of ammonia in steam condensates and demineralizer effluents.
1.3Test 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.
1.4Both test methods A and B are applicable to surface and industrial waters and wastewaters following distillation. The test method for distillation given in Appendix X1 has been used in the past to meet requirements for predistillation of samples being analyzed for ammonia.
1.5The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6This 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.
1.7The 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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