BS 4140-22-1980 氧化铝试验方法.第22部分:锰含量的测定

标准号：BS 4140-22-1980
中文标准名称：氧化铝试验方法.第22部分:锰含量的测定
英文标准名称：Methods of test for aluminium oxide - Determination of manganese content
标准类型：G13
发布日期：1980/4/30 12:00:00
实施日期：1980/4/30 12:00:00
中国标准分类号：G13
国际标准分类号：71.100.10
适用范围：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.