T/GDCAA 004-2022
T/GDAEM 4-2022
BS 5551-4.1.4:1984
Fertilizers. Chemical analysis. Determination of nitrogen-Method for determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide (titrimetric method)
GB/T 34532-2017
Coking wastewater—Determination of ammonia nitrogen content—Formaldehyde method
GB/T 31195-2014
High chloride high ammonia wastewater―Determination of chemical oxygen demand―Chloride ion calibration 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)
KS K ISO 1833-15-2022
Textiles — Quantitative chemical analysis —Part 15: Mixtures of jute with certain animal fibres (method by determining nitrogen content)
EN ISO 1833-15:2019
ISO 1833-15:2019
Textiles — Quantitative chemical analysis — Part 15: Mixtures of jute with certain animal fibres (method by determining nitrogen content)
GB/T 3600-2000
Fertilizers--Determination of ammoniacal nitrogen content--Formaldehyde method
GB/T 3595-2000
Fertilizers--Determination of ammoniacal nitrogen content--Titrimetric method after distillation
GB/T 17674-2021
Determination of nitrogen in crude oil—Boat-inlet chemiluminescence
GB/T 34500.5-2017
Chemical analysis methods for rare earth residue and waste water—Part 5:Determination of ammonia nitrogen content
GB/T 5121.8-2024
Methods for chemical analysis of copper and copper alloys—Part 8 : Determination of oxygen, nitrogen and hydrogen contents
YS/T 1179.3-2023
NB/SH/T 0704-2010
Standard test method for nitrogen in petroleum and petroleum products by boat-inlet chemiluminescence
GB/T 17674-2012
Determination of nitrogen in crude oil by boat-inlet chemiluminescence
20243166-T-606
Analysis of water treatment chemicals—Part 3: Determination of ammonia nitrogen
YS/T 1396.1-2020