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See Chinese contents: GB/T 3051-2000 GB/T 3051-2000: Inorganic chemical products for industrial use. General method for determination of chloridecontent. Mercurimetric method
This standard specifies a general method for the determination of chloride content in inorganic chemical products - Mercurimetric method. This standard is applicable to specimen, which has a chloride (in terms of C1) content of 0.01 mg ~ 80 mg. When the concentration of mercury nitrate standard solution used is less than 0.02 mol/L, the titration shall be carried out in an ethanol-water solution. The ions K+, Na+, Ca2+, Mg2+, Ba2+, Zn2+, Pb2+, NO3-, CO32-, BO33- do not interfere with the determination. The ions S2-, SO32-, SO42-, PO43-, [Fe(CN)6]3-, [Fe(CN)6]4-, S2O32-, NO2-, CNS-, CN- interfere with the determination; the limits and elimination methods are as shown in Appendix B (Normative) and Appendix C (Informative).
