Reference
Method
Test
Reagent #
Reagent Name
EPA
Colorimetric; Titrimetric; Potentiometric
Nitrogen, Kjeldahl, Total
7.8
Ammonium Chloride, Stock Solution, 1.0 mL = 1.0 mg NH3-N
EPA
Colorimetric, Automated Phenate
Nitrogen, Ammonia
6.7
Stock Solution, 1.0 mL = 1.0 mg NH3-N
EPA
Potentiometric, Ion Selective Electrode
Nitrogen, Kjeldahl, Total
6.6
Ammonium Chloride, Stock Solution, 1.0 mL = 1.0 mg NH3-N
EPA
Potentiometric, Ion Selective Electrode
Nitrogen, Ammonia
6.3
Ammonium Chloride, Stock Solution, 1.0 mL = 1.0 mg NH3-N
EPA
Colorimetric; Titrimetric; Potentiometric – Distillation Procedure
Nitrogen, Ammonia
6.2
Ammonium Chloride, Stock Solution, 1.0 mL = 1.0 mg NH3-N
EPA
Colorimetric, Semi-Automated Block Digester, AAII
Nitrogen, Kjeldahl, Total
6.1
Ammonium Chloride, Stock Solution, 1.0 mL = 1.0 mg NH3-N
ASTM
Semiautomated Colorimetric Bertholt
Total Kjeldahl Nitrogen
19.1
Ammonia Solution, Stock (1.0 mL = 1.0 mg ammonium nitrogen)
ASTM
Manual Digestion / Distillation
Total Kjeldahl Nitrogen
11.1
Ammonia Solution, Stock (1.0 mL = 1.0 mg ammonia nitrogen)
APHA
Phenate Method
Nitrogen (Ammonia)
3f
Stock Ammonium Solution
APHA
Ammonia-Selective Electrode Method
Nitrogen (Ammonia)
3d
Stock Ammonium chloride Solution
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