Publikuar
The method specified are applicable directly to soluted mateials or materials soluble in boiling water. In case of solid chemicals not readily soluble in boiling water, a special preliminary treatment is necessary. Precautions shall be taken in order to avoid absorption of moisture and carbon dioxide. All tests and analyses shall be carried out at a temperature of 20 °C. In order to avoid incorrect results use only reagents of analytical grade. Replaces ISO Recommendation R 1686-1970
PUBLISHED
ISO 1686:1976
90.93
Standard confirmed
20 tet 2023
Silikate natriumi dhe kaliumi për përdorim industrial - Marrja e mostrës dhe metodat e provës - Të përgjithshme
60.60 Standard published