標準號：BS 4140-5-1986
中文標準名稱：氧化鋁試驗方法.第5部分:二氧化硅含量測定
英文標準名稱：Methods of test for aluminium oxide - Determination of silica content
標準類型：G13
發布日期：1986/1/31 12:00:00
實施日期：1986/1/31 12:00:00
中國標準分類號：G13
國際標準分類號：71.100.10
適用范圍：This International Standard specifies a reduced molybdo-silicate spectrophotometric method for the determination of the silica content of aluminium oxide primarily used for the production of aluminium. The method is applicable to products having an SiO2 content between 0,005 and 0,025 % (m/m), provided that the content of (P2O5 + V2O5) does not exceed 0,02% (m/m). 1 Special cases 1.1 SiO2 content between 0,025 and 0,25%(m/m)[(P2O5+V2O5)content not exceeding 0,02%(m/m)]. 1.2(P2O5+V2O5)content exceeding 0,02%(m/m)(under study).