GB/T 3051-2000: Inorganic chemical products for industrial use. General method for determination of chloridecontent. Mercurimetric method

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Scope

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).

Basic Data

Standard ID	GB/T 3051-2000 (GB/T3051-2000)
Description (Translated English)	Inorganic chemical products for industrial use. General method for determination of chloridecontent. Mercurimetric method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	G10
Classification of International Standard	71.040.40
Word Count Estimation	8,876
Date of Issue	2000-07-31
Date of Implementation	2001-03-01
Older Standard (superseded by this standard)	GB 3051-1982
Quoted Standard	GB/T 603-1988; GB/T 6682-1992
Adopted Standard	ISO 5790-1979; NEQ
Issuing agency(ies)	State Quality and Technical Supervision
Summary	This standard specifies: Determination of chloride content of inorganic chemical products General method Mercury Method. This standard applies to: chloride (Cl) content of 0. 01mg-80mg- sample, When using mercuric nitrate standard solution concentration is less than 0. 02mol/L while, titration should be ethanol carried out in aqueous solution. K +, Na +, Ca2 +, Mg2 +, Ba2 +, Zn2 +, Pbt +, NO3-, COs2-, BO32- ions did not interfere with the determination, S2-, S032-, S024 one, PO43-, [Fe (CN) 4] 3 -, [Fe (CN) 4] 4 -, S2O33-, N, 3 -, CNS-, CN- plasma were interfere with the determination, their limits and troubleshooting see Appendix B (standard Appendix) and Appendix C (Tip Appendix).