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ASTM D1426-2008 水中氨态氮的标准试验方法

ASTM D1426-2008 水中氨态氮的标准试验方法

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【英文标准名称】: Standard Test Methods for Ammonia Nitrogen In Water
【原文标准名称】: 水中氨态氮的标准试验方法
【标准号】: ASTM D1426-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: D19.05
【标准类型】: (Test Method)
【标准水平】: ()
【中文主题词】:
【英文主题词】: ammonia; analysis; calorimetric; electrode; water; Electrodes; Ferrous-ferric reference solutions; Inorganic compounds--water; Ion selective electrode method; Nitrogen content--water; Ammonia content; Ammonia nitrogen content; Colorimetric analysis--wa
【摘要】: 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. 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
Test Method Ax2014;Direct Nesslerization
7 to 15
Test Method Bx2014;Ion Selective Electrode
16 to 24

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