ASTM D1426-15
Standard Test Methods for Ammonia Nitrogen In Water

Standard No.

ASTM D1426-15

Release Date

2015

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D1426-15(2021)e1

Latest

ASTM D1426-15(2021)e1

Scope

4.1 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.

4.2 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.4 Ammonia may occur in water as a product of anaerobic decomposition of nitrogen containing compounds or from waste streams containing ammonia.

1.1 These test methods cover the determination of ammonia nitrogen, exclusive of organic nitrogen, in water. Two test methods are included as follows:

	Sections
8199;Test Method A—Direct Nesslerization	7 – 16
8199;Test Method B—Ion Selective Electrode	17 – 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 ......

ASTM D1426-15 Referenced Document

• ASTM D1066 Standard Practice for Sampling Steam
• ASTM D1129 Standard Terminology Relating to Water
• ASTM D1193 Standard Specification for Reagent Water
• ASTM D2777 Standard Practice for Determination of Precision and Bias of Applicable Methods of Committee D-19 on Water
• ASTM D3370 Standard Practices for Sampling Water from Closed Conduits
• ASTM D5810 Standard Guide for Spiking into Aqueous Samples 
• ASTM D5847 Standard Practice for Writing Quality Control Specifications for Standard Test Methods for Water Analysis
• ASTM E275 Standard Practice for Describing and Measuring Performance of Ultraviolet, Visible, and Near-Infrared Spectrophotometers
• ASTM E60 Standard Practice for Analysis of Metals, Ores, and Related Materials by Molecular Absorption Spectrometry

ASTM D1426-15 history

• 2021 ASTM D1426-15(2021)e1 Standard Test Methods for Ammonia Nitrogen In Water
• 2015 ASTM D1426-15 Standard Test Methods for Ammonia Nitrogen In Water
• 2008 ASTM D1426-08 Standard Test Methods for Ammonia Nitrogen In Water
• 2003 ASTM D1426-03 Standard Test Methods for Ammonia Nitrogen In Water
• 1998 ASTM D1426-98 Standard Test Methods for Ammonia Nitrogen In Water