GB/T 19421.4-2003 Test methods of crystalline layered sodium disilicate--EDTA volumetric methods for determination of calciumion exchange capacity (English Version)
This part of GB/T 19421 specifies the analysis method for calcium exchange capacity in layered crystalline sodium disilicate. This section applies to the determination of the calcium exchange capacity of layered crystalline sodium disilicate that can be used as a detergent builder.
GB/T 19421.4-2003 history
2008GB/T 19421-2008 Test methods of crystalline layered sodium disilicate
2003GB/T 19421.4-2003 Test methods of crystalline layered sodium disilicate--EDTA volumetric methods for determination of calciumion exchange capacity
GB/T 19421.4-2003 Test methods of crystalline layered sodium disilicate--EDTA volumetric methods for determination of calciumion exchange capacity was changed to GB/T 19421-2008 Test methods of crystalline layered sodium disilicate.