Analysis of aluminium ores. Chemical methods - Method for determination of silicon content: combined gravimetric and spectrophotometric methodWhat is BS 6870 2. 4 Combined gravimetric and spectrophotometric method for the determination of the total silicon content in aluminium ores about? BS 6870 2. 4 specifies a combined gravimetric method and spectrophotometric method for the determination of the total silicon content in aluminium ores. The method is applicable to ores containing between 1 and 25 % (m m) of silicon dioxide. Who is BS 6870 2. 4 Combined gravimetric and spectrophotometric

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