2020QB/T 2623.1-2020 Soap test methods Determination of free caustic alkali content in soap
2003QB/T 2623.1-2003 Test methods of soaps Determination of free caustic alkali content in soaps
1970QB/T 3748-1999 Determination of free caustic content in AE soap
QB/T 3748-1999 Determination of free caustic content in AE soap has been changed from GB 7455-1987 Determination of free caustic content in soap.
QB/T 3748-1999 Determination of free caustic content in AE soap was changed to QB/T 2623.1-2003 Test methods of soaps Determination of free caustic alkali content in soaps.