GB/T 34532-2017
Coking wastewater—Determination of ammonia nitrogen content—Formaldehyde method
GB/T 41965-2022
Photography—Processing waste—Determination of total amino nitrogen (microdiffusion Kjeldahl method)
GB/T 41964-2022
Photography—Processing waste—Determination of ammoniacal nitrogen (microdiffusion method)
GB/T 3600-2000
Fertilizers--Determination of ammoniacal nitrogen content--Formaldehyde method
HJ 537-2009
HJ/T101-2003
HJ 101-2019
GB/T 3595-2000
Fertilizers--Determination of ammoniacal nitrogen content--Titrimetric method after distillation
HJ/T 195-2005
Water quality-Determination of ammonia-nitrogen Gas-phase molecular absorption spectrometry
HJ 535-2009
HJ 536-2009
HJ 666-2013
HJ 665-2013
CJ 26.25-1991
DZ/T 0064.57-2021
Methods for analysis of groundwater quality—Part 57:Determination of ammonia nitrogen—Nessler’s reagent spectrophotometry
HJ/T 101-2003
The technical requirement for water quality automatic analyzer of amonia
T/NAIA 0169-2022
KS I ISO 11732-2023
Water quality — Determination of ammonium nitrogen — Method by flow analysis (CFA and FIA) and spectrometric detection
20243166-T-606
Analysis of water treatment chemicals—Part 3: Determination of ammonia nitrogen
T/CHES 12-2017