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岩矿中低含量稀土总量的测定,常用PMBP-苯萃取、偶氮胂Ⅲ光度法。由于用苯作稀释剂,因而危害人体,污染环境。本实验用CL-PMBP萃淋树脂萃取层析分离岩矿中的稀土,分离后用偶氮胂Ⅲ光度法测定。操作简便,易于掌握,可免用有机试剂,减轻劳动强度。可测定岩矿中n·10~(-3)～n·10~(-1)%稀土总量。
Determination of the total amount of rare earth in rock ore, commonly used PMBP-benzene extraction, arsenazo Ⅲ spectrophotometry. Because benzene as diluent, thus endangering the human body, pollute the environment. In this experiment, CL-PMBP extraction resin extraction chromatography separation of rare earth rocks and rocks, after separation with arsenazo spectrophotometry. Easy to operate, easy to grasp, free organic reagents, reduce labor intensity. The total amount of rare earths n · 10 ~ (-3) ~ n · 10 ~ (-1) in rock ore can be determined.