GB/T 19421-2008 (English Version) PDF

Standard No.: GB/T 19421-2008
Language: Chinese, Available in English version
Release Date: 2008
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 19421-2008
Replace: GB/T 19421.1-2003 GB/T 19421.12-2003 GB/T 19421.11-2003 GB/T 19421.10-2003 GB/T 19421.9-2003 GB/T 19421.8-2003 GB/T 19421.7-2003 GB/T 19421.6-2003 GB/T 19421.5-2003 GB/T 19421.4-2003 GB/T 19421.3-2003 GB/T 19421.2-2003

Scope: This standard specifies the qualitative analysis of layered crystalline uranium disilicate for detergent builders by δ-phase X-ray diffractometer method and its whiteness, pH value, calcium exchange capacity, magnesium exchange capacity, loss on ignition, wet water storage, Test methods for indicators such as ferric oxide, sodium oxide, silicon dioxide, calcium oxide, and magnesium oxide. This standard applies to the index determination of layered crystalline sodium disilicate products used in detergents, and also applies to the determination of some indexes of other types of silicate products used in detergents.

GB/T 19421-2008 Referenced Document

GB/T 13173.1-1991 Method of sample division for detergents
GB/T 9086-2007 The white standard plate for colorimetry and photometry
QB/T 2739-2005 Preparations of standard volumetric solutions of general test methods for washing products

2008 GB/T 19421-2008 Test methods of crystalline layered sodium disilicate
2003 GB/T 19421.2-2003 Test methods of crystalline layered sodium disilicate--Measurement of whiteness