Reference
Method
Test
Reagent #
Reagent Name
EPA
Colorimetric; Titrimetric; Potentiometric
Nitrogen, Kjeldahl, Total
7.9
Ammonium Chloride, Standard Solution, 1.0 mL = 0.01 mg NH3-N
EPA
Colorimetric, Automated Phenate
Nitrogen, Ammonia
6.8
Standard Solution A, 1 mL = 0.01 mg NH3-N
EPA
Potentiometric, Ion Selective Electrode
Nitrogen, Kjeldahl, Total
6.7
Ammonium Chloride, Standard Solution, 1.0 mL = 0.01 mg NH3-N
EPA
Potentiometric, Ion Selective Electrode
Nitrogen, Ammonia
6.4
Ammonium Chloride, Standard Solution, 1.0 mL = 0.01 mg NH3-N
EPA
Colorimetric; Titrimetric; Potentiometric – Distillation Procedure
Nitrogen, Ammonia
6.3
Ammonium Chloride, Standard Solution, 1.0 mL = 0.01 mg NH3-N
ASTM
Semiautomated Colorimetric Bertholt
Total Kjeldahl Nitrogen
19.2
Ammonia Solution, Standard (1.0 mL = 0.01 mg ammonium nitrogen)
ASTM
Manual Digestion / Distillation
Total Kjeldahl Nitrogen
11.2
Ammonia Solution, Standard (1.0 mL = 0.01 mg ammonia nitrogen)
APHA
Nesslerization Method (Direct and Following Distillation)
Nitrogen (Ammonia)
3e
Standard Ammonium Solution
APHA
Cyanates
Cyanide
3b
Standard Ammonium Chloride Solution, 10.0 mg NH3-N/L
ACS
Standard Solutions
N/A
N/A
Nitrogen Standard Solution (0.01 mg of N in 1 mL)