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本文研究以弱酸性的NaCl溶液提取希土矿中的离子吸附型希土,以PMBP—苯萃取法分离杂质,在Na_2SO_4-H_2SO_4介质中(对以轻希土为主的矿在H_2SO_4介质中),用偶氮氯膦-mN显色,测定希土总量。用同一显色剂,在H_3PO_4-H_2C_2O_4-Na_4P_2O_7介质中,测定轻希土分量,差减法求算重希土分量。方法灵敏可靠,重现性好,适合于希土矿中离子吸附型希土总量和轻重希土分量的测定。
In this paper, weakly acidic NaCl solution was used to extract ion-adsorbing rare earth in the ore, and the impurities were separated by PMBP-benzene extraction method. In Na_2SO_4-H_2SO_4 media (for the light-earth-dominated ore in H_2SO_4 medium) , With chlorophosphonazo-mN color, measured the total amount of Greek soil. The same color reagent, in H_3PO_4-H_2C_2O_4-Na_4P_2O_7 medium, the determination of light-earthen soil components, subtractive subtraction method for the calculation of heavy-Hetian soil components. The method is sensitive and reliable with good reproducibility and is suitable for the determination of the total amount of ionic and adsorptive-type rare earths and the fraction of light,