2017GB/T 16484.13-2017 Chemical analysis methods for rare earth chloride and light rare erath carbonate--Part 13: Determination of ammonium chloride content
2009GB/T 16484.13-2009 Chemical analysis methods of rare earth chloride and light rare earth carbonate.Part 13:Determination of ammonium chloride content.Distillation-titrimetry
1996GB/T 16484.13-1996 Methods for chemical analysis of rare earth chloride and carbonate--Determination of ammonium chloride content