GB/T 19421.8-2003
Test methods of crystalline layered sodium disilicate--Phenanthroline photometric methods for determination of iron oxide content (English Version)

Standard No.
GB/T 19421.8-2003
Language
Chinese, Available in English version
Release Date
2003
Published By
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status
 2008-12
Replace By
GB/T 19421-2008
Latest
GB/T 19421-2008
Scope
This part of GB/T 19421 specifies the method for the determination of ferric oxide by the o-phenanthroline colorimetric method in layered crystalline sodium disilicate. This section applies to the determination of ferric oxide content (0.01% to 0.1%) in layered crystalline sodium disilicate that can be used as a detergent builder.

GB/T 19421.8-2003 history

  • 2008 GB/T 19421-2008 Test methods of crystalline layered sodium disilicate
  • 2003 GB/T 19421.8-2003 Test methods of crystalline layered sodium disilicate--Phenanthroline photometric methods for determination of iron oxide content

GB/T 19421.8-2003 Test methods of crystalline layered sodium disilicate--Phenanthroline photometric methods for determination of iron oxide content was changed to GB/T 19421-2008 Test methods of crystalline layered sodium disilicate.

Test methods of crystalline layered sodium disilicate--Phenanthroline photometric methods for determination of iron oxide content

GB/T 19421.8-2003 -All Parts

GB/T 19421.1-2003 Test methods of crystalline layered sodium disilicate--Qualitative analysis of delta-crystalline layered sodium disilicate--Method of X-ray diffractometer GB/T 19421.10-2003 Test methods of crystalline layered sodium disilicate--Potassium fluosilicate volumetric methods for determination of silica dioxide content GB/T 19421.11-2003 Test methods of crystalline layered sodium disilicate--Atomic absorption spectrophotometric methods for determination of calcium oxide content GB/T 19421.12-2003 Test methods of crystalline layered sodium disilicate--Atomic absorption spectrophotometric methods for determination of magnesium oxide content GB/T 19421.2-2003 Test methods of crystalline layered sodium disilicate--Measurement of whiteness GB/T 19421.3-2003 Test methods of crystalline layered sodium disilicate--Method for determination of pH GB/T 19421.4-2003 Test methods of crystalline layered sodium disilicate--EDTA volumetric methods for determination of calciumion exchange capacity GB/T 19421.5-2003 Test methods of crystalline layered sodium disilicate--EDTA volumetric methods for determination of magnesium exchange capacity content GB/T 19421.6-2003 Test methods of crystalline layered sodium disilicate-Gravimetric methods for determination of the loss on ignition GB/T 19421.7-2003 Test methods of crystalline layered sodium disilicate-Gravimetric methods for determination of hygroscopic moisture GB/T 19421.8-2003 Test methods of crystalline layered sodium disilicate--Phenanthroline photometric methods for determination of iron oxide content GB/T 19421.9-2003 Test methods of crystalline layered sodium disilicate--Potassium fluosilicate volumetric methods for determination of sodium oxide content


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