GB/T 11213.7-1989
Sodium hydroxide for chemical fiber use--Determination of copper mass fraction--Spectrometric method (English Version)
- Standard No.
- GB/T 11213.7-1989
- Language
- Chinese, Available in English version
- Release Date
- 1989
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2009-02
- Replace By
- GB/T 11213.7-2008
- Latest
- GB/T 11213.7-2008
- Scope
- This standard specifies the determination method of copper content in sodium hydroxide for chemical fiber. This method is applicable to products with a copper content of 0.00001% to 0.0001% in sodium hydroxide.
GB/T 11213.7-1989 history
- 2008 GB/T 11213.7-2008 Test methods of sodium hydroxide for chemical fiber use.Part7:Determination of copper content.Spectrometric method
- 1989 GB/T 11213.7-1989 Sodium hydroxide for chemical fiber use--Determination of copper mass fraction--Spectrometric method
GB/T 11213.7-1989 -All Parts
GB/T 11213.1-2007 Sodium hydroxide for chemical fiber use.Determination of sodium hydroxide content
GB/T 11213.2-2007 Sodium hydroxide for chemical fiber use.Determination of sodium chloride content.Spectrometric method
GB/T 11213.3-2003 Sodium hydroxide for chemical fiber use--Determination of the calcium content--EDTA complexometric method
GB/T 11213.4-2006 Sodium hydroxide for chemical fiber use.Determination of silicon content.Reduced molybdosilicate spectrophotometric method
GB/T 11213.5-2006 Sodium hydroxide for chemical fiber use.Determination of sulphate content
GB/T 11213.6-1989 Sodium hydroxide for chemical fiber use--Determination of sulphate mass fraction--Turbidimetric method
GB/T 11213.7-2008 Test methods of sodium hydroxide for chemical fiber use.Part7:Determination of copper content.Spectrometric method