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铁矿石中微量稀土(0.000n％)的化学分析,目前还未很好地解决。我室原使用乙醚萃取和铜铁试剂的氯仿溶液萃取除铁已用于白云铁矿之稀土的分离和测定,但分离的铁远小于1克,使用离子交换除铁又很慢。最近,潘景瑜同志提出,以磺基水杨酸掩蔽铁的PMBP-苯萃取法,只能分离0.1克铁,该法只适用下0.00n％以上含量的稀土的测定。
The chemical analysis of trace rare earth (0.000n%) in iron ore has not been solved yet. My room was originally extracted with ether and copper and iron reagent chloroform solution extraction iron has been used for the separation and determination of rare earths in the Baiyun Iron Mine, but the separation of iron is much smaller than 1 gram, the use of ion exchange is very slow. Recently, Comrade Pan Jingyu proposed that sulfosalicylic acid-masked iron PMBP-benzene extraction method can only separate 0.1 g of iron. This method is only applicable to the determination of rare earth with the content of 0.00 n% or more.