6ISO 21078-1:2006 Determination of boron( Ⅲ ) oxide in refractory products -Determination of total boron( Ⅲ ) oxide in oxidic materials for ceramics glass and glazes [ S ].
7ISO 21078-2:2007 Determination of boron ( Ⅲ) oxide in refractory products -Part 2: Acid extraction method for the determination of boron ( Ⅲ ) oxide in binder components [ S ].