This International Standard specifies a flame atomic absorp-tion method for the determination of the manganese con-tent of aluminium oxide primarily used for the production of aluminium. The method is applicable to products of which the manga-nese content, expressed as Mn, is between 0,000 2 and 0,005 % (m/m) (0,000 258 and 0,006 46 % (m/m), express-ed as MnO). NOTE—If the apparatus available does not have a sufficient sensi-tivity for the lower contents of manganese, it is recommended that there should be prior extraction of the manganese, by the method specified in annex A.
BS 4140-22-1980由英国标准学会 GB-BSI 发布于 1980-04-30,并于 1980-04-30 实施。
BS 4140-22-1980 在中国标准分类中归属于: G13 氧化物、单质,在国际标准分类中归属于: 71.100.10 铝生产用材料。
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